单项选择题

Whatever you do, you _______ click with the right mouse button or the program will crash.

A．don't have to
B．must not
C．might not
D．needn't
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Sean could not help _______ at the end of sad movie.
A．cry
B．to cry
C．crying
D．cries
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I saw an accident _______ home.
A．on my way to
B．on my way
C．at the way
D．at my going
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