摘要：They had to before they finished the course because they were not well disciplined. A.drop in B.drop out C.drop off D.drop by
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They had to_________ before they finished the course because they were not well disciplined.
A.drop in B.drop out
C.drop off D.drop by
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They had to_________ before they finished the course because they were not well disciplined.
A.drop in B.drop out
C.drop off D.drop by
查看习题详情和答案>>
They had to_________ before they finished the course because they were not well disciplined.
| A．drop in | B．drop out |
| C．drop off | D．drop by |