As a rule, you can borrow only two books ______ in the library.A．at one timeB．at
题型：不详难度：来源：
As a rule, you can borrow only two books ______ in the library.| A．at one time | B．at a time | C．in no time | D．at times |
|
答案
| B |
解析
| “作为一个规定，一次你只能从图书馆借一本书。”at one time“曾经”，at a time”一次”，in no time“立刻”，at times“有时候”，所以答案B。 |
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