Itstenyearssincethescientistto

It's ten years since the scientist _______to discover the valuable chemical.

A．kept up

B．set out

C．took in

D．set about

登录免费查看答案和解析

相关试题

So far we have done a lot to build a low-carbon economy, but it is ____ ideal (理想). We have to work still harder.

A．next to

B．far from

C．out of

D．due to

收藏答案/解析

There was a _____ look on his face. He found what the expert said too difficult to understand.

A．puzzle

B．puzzling

C．puzzled

D．to puzzle

收藏答案/解析

According to the literary review, Laoshe ____ his characters live through their languages in his plays.

A．will make

B．had made

C．was making

D．makes

收藏答案/解析

People are using more and more natural gas, wind and other forms of _____.

A．energy

B．force

C．power

D．strength

收藏答案/解析

I’d appreciate ____ if you would like to teach me how to use blog and twitter on the Internet.

A．that

B．it

C．this

D．what

收藏答案/解析