摘要： has a good knowledge of
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He has a good knowledge of electricity, ________ helps him a lot in his work．
- A.that
- B.who
- C.when
- D.which
He has a good knowledge of English, but little ______ he know about Cerman.
[ ]
A. have
B. did
C. has
D. does
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B. did
C. has
D. does
He has a good knowledge of electricity, ______helps him a lot in his work.
A. that B. who C. when D. which
查看习题详情和答案>>