单项选择题

I’ve never seen the young man ______ next to the director.

A) sits
B) sitting
C) sat
D) to sit
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Customers consider location as the first factor when （） a decision about buying a house.

A. make
B. made
C. to make
D. making
单项选择题
Owing to space research, TV pictures can be transmitted______.
A) live
B) alive
C) living
D) lively
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