单项选择题

()any instructiorts from the Head Office, we couldn’t make any decision.

A. Not receiving
B. Receiving no
C. Not having recived
D. Having not received

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As people live longer, they()to change their ideas about life

A. like
B. tend
C. wish
D. long
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There is an arrow on the wall()the direction of advance.

A. pointing
B. identifying
C. marking
D. indicating
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