题目内容
The new books are of great use, they _____ well and _____ already.
| A.sell : sell out | B.sold : had sold out | C.sold : have sold out | D.sell : have been sold out |
D
略
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题目内容
| A.sell : sell out | B.sold : had sold out | C.sold : have sold out | D.sell : have been sold out |