Some birds migrate to the south when______.

Some birds will fly away to the south in winter, while _____ will stay with you.

A. another

B. the others

C. others

D. other ones

Some officials believe bird flu spread to Africa mainly due to ______.

A. the trade of farm birds

B. the waste and liquids of infected birds

C. the fact that sortie people touched sick birds or any infected part of sick birds

D. the virus changed and started spreading in some new forms

A.Once

B.of

C.Although

D.Because

A．How birds learn to build nests.

B．Why birds lay eggs.

C．How bird's nests have evolved.

D．Why some bird's nests are considered primitive.

Deer leave the high ground and come down from the mountains before a storm.If you see this, you can be sure that there will be a storm within two days.When you see large numbers of sea crabs on a sandy beach, it is time to leave.A change in air pressure over the water warns the crabs that a storm is coming.To escape the stormy sea pounding the shore, they leave the water and seek shelter on land.

Birds are especially good weather indicators because they also show the effect of a pressure drop in many ways.For example, some birds become easily annoyed and will fight over a piece of bread.Other birds sing just before a storm.It seems they know they won't get another chance for an hour or two.Birds also seek shelter before a storm.You will sometimes see birds resting in trees or staying closely together on a wire near a building.This is a good storm signal.

Seabirds sit out a storm on land.Anytime you see seagulls sitting on the ground in large groups, reluctant to fly, it is not a very good day to go sailing.It is unusual to see large groups of birds flying overhead in the summertime.Watch for other weather signs if you see this.You should also stay alert if you see migrating birds flying in the wrong direction.These birds may be flying ahead of a storm.And if you can't see a bird anywhere, look out! They may have flown to a different place because a violent storm is coming in their direction.

1.What's the main idea of the passage？

A.How to pay close attention to important clues in nature.

B.How to become prepared for any kind of weather.

C.How to predict weather changes by wildlife.

D.What to do when we see the weather signs.

2.When a storm is surely coming in two days, ________.

A.some birds become easily annoyed and fight with each other

B.deer leave the high ground and come down from the mountains

C.large number of sea crabs move on a sandy beach

D.field mice come out of their holes and run around

3.What wildlife indicates particularly well that a storm is coming？

A.Seagulls.

B.Sea crabs.

C.Field mice.

D.Birds.

4.How can you know it's not a good day to go sailing？

A.Migrating birds are flying in the wrong direction.

B.You can't see a bird anywhere.

C.Seagulls are sitting on the ground in large groups.

D.Birds are flying overhead in the summertime.

5.What does the want to say？

A.Wildlife is a good helper to predict the weather.

B.Wildlife is more efficient in predicting the weather.

C.People need to find out about the weather change.

D.Get prepared before a violent storm is coming.

A.evolution

B.book

C.pen

D.writing

阅读理解：阅读下面的短文，根据文章内容从A、B、C三个选项中选出一个最佳选项。

There are more ants than any other kinds of land animals in the world. They range from 0.1 to 1 inch long and are usually yellow, brown, red, or black. Ants live in societies in which they depend on one another. The societies are not all exactly the same because there are ants of very many kinds. But in general, each kind has ants of three main typesA、queens, males, and workers.

The ants have a good many enemies. They include birds, bears and ant eaters of various kinds. In some cases other ants are their worst enemies, as man’s enemy is man. In some parts of the world, red ants march in large armies to attack the homes of black ants. Some of them succeed in getting inside of the tunnels of black ants, whose entrances have been blocked. They try to carry the black ant babies away. The black ants do all they can to prevent that. They send their biggest soldiers into action. Very many of the red ants soldiers are killed but some escape with babies belonging to the black ants. The red ants take the babies home and bring them up. They become the only workers for the red ants.

Ants as a group are beneficial to humans. Their tunnels mix and soften the soil, in some places replacing the activity of earthworms. Some of ants are harmful to humans. For example, the fire ant, which has a painful bite, is a serious pest to humans and domestic animals in many parts of the world.

1. Which kind of ants is not regarded as the main types of ants in general？ {A、B、C}

A. Queen ants.

B. Soldier ants.

C. Worker ants.

2. According to the passage, what do we learn about the ants’ enemies？ {A、B、C}

A. They are of many kinds.

B. They are birds and ant eaters.

C. They are the same as man’s enemies.

3. The red ants attack the black ants’ home because {A、B、C}.

A. black ants are better soldiers

B. red ants are stronger than black ants

C. they don’t have workers of their own

4. According the passage, which of the following statements is TRUE？ {A、B、C}

A. The number of ants is the most in the world.

B. Each ant depends upon itself in the society.

C. Ants are useful to human on some conditions.

5. The main purpose of the passage is to {A、B、C}.

A. explain some information about ants

B. show the difference between red ants and black ants

C. convince people that ants as a group is beneficial insect