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

A.caught on                  B.set out                       C.made for                   D.took up

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

A. caught on B. set out

C. made for D. took up?

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

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

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

To keep healthy, Professor Johnson _________ cycling as a regular form of exercise

after he retired.

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

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

A. made up　 B. put up 　　　　 C. took up 　　　　 D. carried out

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

　 A.made up　 B.put up 　　　 C.took up 　　　　 D.carried out

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

　 A.made up　 B.put up 　　　 C.took up 　　　　 D.carried out

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

1. A.
   took up
2. B.
   caught on
3. C.
   carried out
4. D.
   made for