题目内容
| He has made many friends, _____ is helpful to him when he is in trouble. |
A. which B. who C. it D. that |
试题答案
A
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He has made many friends, _____ is helpful to him when he is in trouble.
[ ]
A. which
B. who
C. it
D. that
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B. who
C. it
D. that