—The sea is very rough today. —Yes， I‘ve never seen _______ before.B.such rough seaC.such

A.quite

B.quitely

C.quiet

D.quietly

–The sea is very rough today.

–C57 Yes, I’ve never seen __________ before. .

A.such rough sea

B.such a rough sea

C.so rough sea

D.that rough sea

1、There is one spot near the Philippines, where the sea is as deep as ().

A、13 kilometers

B、 9 kilometers

C、 2 kilometers

D、 11 kilometers

2、There are millions of tiny living things that float in the sea, and().

A、they live by eating fish

B、they live by eating plants

C、they are good food for many fish

D、they live by eating worms

3、Which of the following statements is true？ ()

A、When the diver dives under the sea, he gets colder and colder.

B、When the diver sinks to the bottom, he is to be colder and colder.

C、When the diver sinks in the sea, he will be rather cold.

D、When the diver dives downward, the sea gets colder and colder.

4、From the information given, why has the diver to wear a diving suit？ ()

A、Because the diver is likely to be attacked by fish.

B、 Because the water at great depths is very cold.

C、 Because the salt water seems unsuitable for diver.

D、 Because the pressure of water at great depths is immense (巨大的 ).

A.River

B.Mountians

C.Plain

D.Lake