environmentaldamageisdone,itta

__________ environmental damage is done, it takes many years for the ecosystem(生态系统) to recover.

A．Even if

B．If only

C．While

D．Once

登录免费查看答案和解析

相关试题

As long as you’ve paid _________ advance we won’t charge you _________ delivery.

A．by: for

B．in; with

C．in; for

D．by; with

收藏答案/解析

At first he refused to admit he had stolen but when he was shown the videotape he ______ and admitted everything.

A．broke down

B．broke away

C．broke up

D．broke out

收藏答案/解析

Only when _________ be possible to sign the papers.

A．does the boss come will it	B．the boss comes will it
C．has the boss come it will	D．the boss comes it will

收藏答案/解析

Glasses are __and must be handled with great care.

A．abundant

B．diverse

C．extinct

D．fragile

收藏答案/解析

The school rule states that no child shall be, unless _by an adult, allowed out of the school during the day.

A．to be accompanied	B．accompanying
C．accompanied	D．being accompanied

收藏答案/解析

推荐套卷

热门套卷