单项选择题

Only when we have weighted all the factors involved ______ decide when would be the best time to start.

A. did we
B. we did
C. can we
D. we can
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单项选择题
Reading ______ the mind only with materials of knowledge; it is thinking that makes what we read ours.
A. rectifies
B. prolongs
C. minimizes
D. furnishes
单项选择题
You can't help but hear commercials; every few minutes the program is interrupted to give you one advertising ______.
A. so on and so forth
B. more or less
C. something or other
D. sooner or later
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