问题

Sam _____ some knowledge of the computer just bywatching others working on it.
A:had to writeit out
B:looked up
C:picked up
D:set up
B:looked up
C:picked up
D:set up
正确答案是:
同类题型
o help creativity grow, we must firstmake sure we can ______ways and ideas different from our own
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When the man came in, gun in hand, we all stood there, ________.
Does he know how to work out the problem?— Yes, he has _____ a good idea to solve it.