—Tom graduated from college at a very yo

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问题选择题

—Tom graduated from college at a very young age.

—Oh, he ______ have been a very smart boy then.[ ]

A. should

B. can

C. must

D. will

答案

答案：C

单项选择题

在药物结构中含有羧基，具有解热、镇痛和抗炎作用，还有抑制血小板凝聚作用。该药禁用于（）

A.高血脂症

B.肾炎

C.冠心病

D.胃溃疡

E.肝炎

单项选择题

（）is the motor carrier service between the different cities domestically.

A. point to point truck

B. city to city truck

C. Domestic intercity trucking

D. Domestic transportation