问题
选择题
Don't keep your mouth ___ if you want to improve your spoken English.
A．shut
B．shutting
C．shutted
D．to shut
答案
答案：A
keep这里意思是；使保持，后面要求接形容词用它的宾补，而不是keep sth. from doing.。C、D两选项不符合题意。
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