________ is good for our health.
A. Do exercise
B. Doing exercise
C. Does exercise
Done exercise
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You can select the courses _______ on your interest.
A. base
B. basing
C. to base
D. based
No matter ________ happens, his parents always support him.
A. what
B. which
C. how
D. who
Finally, he came ________ a proper answer.
A. up to
B. to up
C. up with
D. with up
She gets a chance to act _______ her plan.
A. at
B. out
C. over
D. as