The problem just ---in their diacussion is an important one.A,to be refered to B.referred to

The problem just ---in their diacussion is an important one.A,to be refered to B.referred to

题目
The problem just ---in their diacussion is an important one.A,to be refered to B.referred to
C.referring to D.referred 选b,why
答案
首先,the problem后面is前面的部分做定语,the problem is referred to,需要被动语态,排除CD,just刚才,需要过去时,排除A(A选项是将来),所以选B.完整的是The problem (which was) just referred to in their discussio...
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