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The little girl who got lost decided to remain _________she was and wait tor her mother.

　　A. where B. what C. how D. who

I had to ______ because someone else wanted to use the phone.

A. give up          B. put up           C. hang up        D. ring up

——The research on the new bird flu virus vaccine is challenging and demanding. Who do you think can do the job?

   ——____ my students have a try?

A、Shall   B、Must C、Will    D、May

____________ great help; I could get rid of all the difficulty and succeeded.

A. Offered                         B. Having offered    

C. Being supplied                  D. Having supplied

The question came up at the meeting____________ we had enough money for our research.

    A. that           B. what           C. which      D. whether

—Our holiday cost a lot of money.

    —Did it? Well, that doesn't matter____________ you enjoyed yourselves.

A. unless     B. in case     C. as far as     D. as long as

—____________ you_________ the editor at the airport?

   —No, he__________ away before my arrival.

A. Have... met; has driven         B. Had... met; was driven

C. Did... meet; had been driven    D. Have... met; had driven

Mr. Smith sold that magnificent cottage of his on the sea  __________2,000,000 dollars.

A. at         B. for           C. to          D. by

We must keep our room clean. Dirt and disease go ____________, you know.

A. from time to time                 B. hand in hand

C. step by step                      D. one after another