问题

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

A: took up
B: caught on
C: carried out
D: made for

正确答案是：

同类题型

Let’s send him home. Do you know _________– I have no idea.

Youare_____carefulthanyourbrotherYoutwocan’tdotheworkthatneedscareandskill

They ________ all the details of the plan time and again to make sure that the project would go smoothly.[ ]

I have a very clever dog. ________ name is Bobo. A．It’s

Many city people their bikes to work every day.