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Americans eat _____ vegetables per person today as they did in 1910.

　 A. more than twice B. as twice as many 　 C. twice as many as　 　 D. more than twice as many

Al but one ___ here just now.　　　 a. is b. was　 c. has been d. were

_______ it enters Southeast Asia, it travels slowly _______ hills and low vally, and the plain ____________ rice grows.

A. as, over，where　 　　B. As, through, where　 　　

C. When, over, that 　　　 D. When, through, that

Mary kept weighting herself to see how much ______ she was getting.

heavier B. heavy 　C. the heavier 　　　　D. the heaviest

I bought it ______ your recommendation.

—Is William seriously ill?

—________. He was rushed to hospital last night.

A．I hope so　　　　　　　　　　　B．I'm afraid so

C．No problem D．It depends

---You should have returned the bok to the library yesterday.

----–But I_________.Don’t you know?

A. had　　　　　　　 B. should　　　　　　 C. did　　　　　　 D. was

Tibet is a ____________（多山的） province .

　　　　 he has limited technical knowledge，the old worker has a lot of experience.?

A.Since　　　 B.Unless?　 C.As　　　　 D.Although