Scientistsareconvincedtheposit

Scientists are convinced ___________ the positive effect of laughter ___________ physical and mental health.

A．of; at

B． by; in

C．of; on

D．on; at

登录免费查看答案和解析

相关试题

I will never forget the day _____ we worked together in London．

A．when

B．on that

C．which

D．while

收藏答案/解析

—That must have been a long trip．
—Yeah, it us a whole week to get there．

A．takes

B．has taken

C．took

D．was taking

收藏答案/解析

To get a better grade, you should __________the notes again before the test．

A．go over

B．get over

C．turn over

D．take over

收藏答案/解析

Mary, I_____ John of his promise to help you．

A．told

B．reminded

C．warned

D．advised

收藏答案/解析

I got this bicycle for______：My friend gave it to me when she bought a new one．

A．everything

B．something

C．anything

D．nothing

收藏答案/解析