We now know that about ____ of all the kinds of seaweed are animals.A: one fourB: once

A、What

B、Why

C、How

D、That

A.assess

B.limit

C.arrange

D.apply

A.A. one fourth

B.B. one fourth of

C.C. one four of

D.D. the one fourth

A.It’s not possible to predict the futur

B.Black holes have changed the laws of physics.

C.Time travel may one day be possibl

D.We now know Einstein was right about everythin

E.

A．We should clean the banks of our rivers

B．We should know what will happen in the future

C．We should know what we should do and do it now

D．We should plant more trees and flowers

A．"Are there any answers that you would like to change,now that you have had time to think things over"

B．"Others in your organization have provided conflicting information． Do we have your permission to explain your point of view"

C．"Do you mind if we check your answers out with others in future interviews"

D．"Is there anything we haven’t touched on that you think is important for me to know"

Dear Sir or Madam

Through the courtesy of the Commercial Counselor of your Embassy in London , we come to know your name and address. Also we are informed that you are a prospective buyer of Chinese Cotton Piece Goods. As this item falls within the scope of our business activities , we shall be pleased to enter into business relations with you.

We enclose a brochure and a pricelist to acquaint you with our commodities now available for export. Quotations and samples will be airmailed to you upon receipt of your specific inquiry.

Your favorable reply will be highly appreciated.

Yours faithfully

ing to kill us. Twenty-five years ago, tiffs was the only question about AIDS we couJd anwer with any certainty; now, it is the only question we really camaot answer well at all. By now, those of us in the AIDS business long term have cared for thousands of patients. No one with that kind of personal experience can doubt for a moment the deadly potential of H. I. V. or the life-saving capabilities of the drugs developed against it. But there are also now htmdreds of footnotes and exceptions and modifications to those two facts that make the big picture ever murkier (扑朔迷离). We have patients scattered at every possible point: men and women who cruise on their medications with no problems at all, and those who never become stable on them and die of AIDS; those who refuse them until it is too late, and those who never need them at all; those who leave AIDS far behind only to die from lung cancer or breast cancer or liver failure, and those few who are killed by the medications themelves. So, when we welcome a new patient into our world, one whose fated place in this world is still unclear, and that patient asks us, as most do, whether this illness is going to kill him or not, it often takes a bit of mental stammering (口吃 ) before we hazard an answer,Now, a complete rundown of all the news from the front would take hours. The statistics change almost; hourly as new treatments appear. It is all too cold, too mathematical, too scary to dump on the head of a sick, frightened person. So we simplify. "We have good treatments now, we say. "You should do fine. " Once, not so long ago, we were working in another universe.Now we have simply rejoined the carnival (嘉年华) of modern medicine, noisy and encouraging, confusing and contradictory, fueled by the eternal balancing of benefits and risks. You can.win big, and why shouldnt you, with the usual fall-safe combination of luck and money. You have our very best hopes, so step right up: we sell big miracles but, offer no guarantees. What does the author say about AIDS？

A.It is definitely deadly twenty-five years ago.

B.The patients want to know everything about it.

C.We can answer anything about it with certainty now.

D.We could not answer questions about it well before.

Dear Sir or Madam,

(1)is our new price list which will(2)by the end of this month．You will see that we have increased our prices on most models．We have, however, refrained from doing so on some models of(3)we hold large stocks．The explanation(4)ur increased prices stems from the fact(5)we are now paying 10% more for our raw materials than we were paying last year, along with some of our subcontractors having raised their prices(6)15%.

As you know, we(7)our product and are(8)of the reputation for quality and dependability we have built over 15 years．We will not(9)that reputation because of raising costs．We have, therefore, decided to raise the price of some of our products.

We hope you will understand our position and(10)your cooperation.

With best regards,