单项选择题

She tried her best to improve her ______ English, but failed.

A. speak
B. to speak
C. speaking
D. spoken
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单项选择题
The young man __ stamps stopped ______ them.
A. collecting, to collect
B. to collect, collecting
C. to collect, to collect
D. collecting, collecting
单项选择题
You must water the flowers every day ______ too dry.
A. stopping them getting
B. to stop them getting
C. stopping them get
D. to stop them to get
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