单项选择题

Mr. Smith's condition looks serious and it is doubtful if he will ______.

A．pull through
B．pull up
C．pull back
D．pull out
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单项选择题
I'm afraid I've taken ______ too much of your time.
A．up
B．after
C．in
D．back
单项选择题
She looked everywhere for her book but ______ had to return home without it.
A．lastly
B．at the end
C．in the end
D．at the last
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