题目内容

Scientists are convincedthe positive effect of laughterphysical and mental health.

A. of; at
B. by; in
C. of, on
D. on; at

查看答案

搜索结果不匹配？点我反馈

更多问题

—Do you mind my opening the window Its a bit hot in here. —, as a matter of fact.

A. Go ahead
B. Yes, my pleasure
C. Yes, I do
D. Come on

—The research on the new birds 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

Because of the financial crisis, days are gonelocal 5star hotels charged 6,000 yuan for one night.

A. if
B. when
C. which
D. since

公安机关对被拘留的人应当在拘留后多长时间内必须进行讯问？（）

A. 12小时
B. 24小时
C. 48小时
D. 72小时