Question

 (2011年東北三校模擬)There are 51 students in Class Three，________failed in the test.

A．all of which                         B．all of them

C．none of whom                     D．none of them

Answer 1

解析：選C。考查定語從句。后半句是非限制性定語從句，修飾先行詞students，應用whom引導。因為前后兩句之間沒有并列連詞，所以B、D兩項不正確。