题目内容
I had been working on math for the whole afternoon and the numbers before my eyes.
| A.swim | B.swum |
| C.swam | D.had swum |
C
解析
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题目内容
I had been working on math for the whole afternoon and the numbers before my eyes.
| A.swim | B.swum |
| C.swam | D.had swum |
C
解析