单项选择题

The little boy had no choice but to look on ______ as his mother was seriously injured in the traffic accident.

A. help
B. helpless
C. helpness

D. helplessly
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单项选择题
You can't come in, ______ you are.
A. whichever
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C. wherever
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单项选择题
It will only take me a minute to get your watch fixed. It will be ready ______.
A. by the way
B. right away
C. at last
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