33．Only after he had spent several nights working on the math problemto wonder whether the
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解决时间 2021-01-04 06:37
- 提问者网友：不爱我么
- 2021-01-03 05:49
33．Only after he had spent several nights working on the math problem to wonder whether the problem was wrongly set．
A. did he begin
B. he began
C. he did begin
D. began he
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- 五星知识达人网友：骨子里都是戏
- 2021-01-03 05:59
(答案→)A. did he beginB. he beganC. he did beginD. began he解析：可联系答.案.网客服索取。
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- 1楼网友：零点过十分
- 2021-01-03 06:24
谢谢了
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