题目内容
How did you manage to get to school on time ______ you missed the school bus?
| A.when | B.if | C.once | D.because |
A
整个句子说得是过去的事,不表示假设,只要排除了once,if,答案就只有A了。
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题目内容
| A.when | B.if | C.once | D.because |