The meeting will begin at ten.So you hav

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问题选择题

The meeting will begin at ten.So you have to be there _________ 9:50.

A．about

B．by

C．after

D．until

答案

答案：B

选择题

10. By the middle of the 21st century , the vast majority of the world’s population ________ in cities rather than in the country.

A．are living

B．will be living

C．have lived

D．will have lived

单项选择题

理想的血浆增容药不应有哪一特点（）

A.无热原质

B.无抗原性

C.可在体内长期停留

D.不干扰凝血功能

E.迅速被消除