单项选择题

Noticing the trouble he caused, he promised to be ______ in the future.

A. careful
B. more carefully
C. the most carefully
D. more careful
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The boy wastes most of his time ______ the eat.
A. to play
B. to play with
C. playing
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单项选择题
lie's never again written ______ as his first one.
A. so good a book
B. such good a book
C. such good book
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