_______ his mother, the baby could not help _______.
A. To see; to laugh
B. Seeing; to laugh
C. Seeing; laughing
D. To see; laughing
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Anything worth _______ is worthy of _______ well.
A. doing; being done
B. doing; doing
C. to be done; to be done
D. to be done; being done
____ is not easy.
A. For cook
B. To cooking
Cooking
D. Cook
China is a ____ country.
A. developing
B. develop
C. developed
D. being developed
Things keep ____.
A. changed
B. changing
C. being changed
D. change