It's twelve now. Let's have ______ lunch

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问题选择题

It's twelve now. Let's have ______ lunch together. [ ]

A. a

B. an

C. the

D. x

答案

答案：D

单项选择题

对于药物降解，常用降解 ______所需的时间为药物的有效期

A．5%

B．10%

C．30%

D．50%

E．90%

选择题

The old lady insisted that her daughter ____ still alive and that she ____ at once.

A．was; was operated

B．was; be operated

C．should be; should be operated

D．be; should be operated