It’s ten years since the scientist ________ on his life’s work of discovering th

题型：不详难度：来源：

It’s ten years since the scientist ________ on his life’s work of discovering the valuable chemical.

A．madefor

B．tookoff

C．setout

D．turnedup

答案

解析

略

举一反三

To keep healthy, Professor Johnson _______ cycling as regular form of exercise after he retired.

A．tookup

B．caughton

C．carriedon

D．madefor

题型：不详难度：| 查看答案

Helen always helps her mother even though going to school ______ most of
her day.

A．savesup

B．makesup

C．takesup

D．putsup

题型：不详难度：| 查看答案

The final examination is coming up soon. It’s time for us to _______ our studies.

A．getdownto

B．getout

C．getbackfor

D．getover

题型：不详难度：| 查看答案

After a long way she was tired and her legs ___________.

A．gavein

B．gaveout

C．gaveup

D．gaveaway

题型：不详难度：| 查看答案

Failure is the mother of success. ______your courage.

A．Keepup

B．Keepoff

C．Keepon

D．Keepaway

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