题目内容
20、Students shouldn’t be given so difficult a problem ___ they cannot work out．
A．that B．which C．while D．As
试题答案
20、D
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Students shouldn’t be given so difficult a problem ___ they cannot work out．
A．that B．which C．while D．As
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Students shouldn’t be given so difficult a problem_________they cannot work out.
| A．that | B．which | C．while | D．As |