题目内容
.Hearing that a 7.1-magnitude earthquake hit the Yushu county, Qinghai province on April 15,the students’ union______us to donate money for the quake-hit area.
| A.called up | B.called for | C.called in | D.called on |
D
略
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题目内容
| A.called up | B.called for | C.called in | D.called on |