Researchesareconvincedtheposit

Researches are convinced ______ the positive effect of laughter ______ physical and mental health.

A．of; at

B．by; in

C．of; on

D．at; on

登录免费查看答案和解析

相关试题

----- Mary looks very upset. She _______ failed to pass the exam.
----- I guess so. It's very difficult after all.

A． must have

B．could have

C．should have

D．might have

收藏答案/解析

— When could you have a meal with me? — I'd like to go ___ it is convenient to you.

A．whichever

B．whenever

C．whatever

D．wherever

收藏答案/解析

— Who are you going to have _______ this letter for you? — My secretary.

A．type

B．typed

C．been typed

D．been typing

收藏答案/解析

Not others but Mother always _____ children ______ in their beautiful clothes.

A．keep; dressed

B．kept; dressing

C．keeps; dressing

D．keeps; dressed

收藏答案/解析

The West Lake we visited last year was really_____ attraction and we'd like to visit it _______ second time next year.

A．\; a

B．the; the

C．an; a

D．\; the

收藏答案/解析