2. 专升本
  3. ( ) for their help, we would not have overcome the difficulties.

( ) for their help, we would not have overcome the difficulties.

admin2017-04-20  18
问题 ( ) for their help, we would not have overcome the difficulties.
选项 A、Weren’t
B、Had it not been
C、Hadn’t it been
D、Had it been not
答案B
解析
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