单项选择题

Every director needs an assistant that he can ______ to take care of problems that may occur in his absence.

A．count on
B．count for
C．count down
D．count out
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单项选择题
Is this the knife ______
A．for which you are looking
B．for that you are looking
C．which you are looking for
D．that you are looking
单项选择题
I expected a more enthusiastic welcome, especially ______ it is the first time I have come here.
A．providing
B．comparing
C．supposing
D．considering
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