题目内容
Do you have any idea of the reason _____ he referred to？
A. that B. where C. why D. when
____ he referred to in his article was unknown to the general reader.
A. That B. What C. Whether D. Where
So many brand marks _____each other that we had great difficulty finding the one he referred to.
A. resembled to B. differed from C. differed D. resembled
The problem he referred to _____ difficult, but is isn’t at all.
A. must be B. seeming C. seems D. seem
he referred to in his article was unknown to the general reader.
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