They were surprised that a child should work out the problem they themselves could not.
A. once
B. unless
C. while
D. if
They were surprised that a child should work out the problem they themselves could not.A.
答案:2 悬赏:20 手机版
解决时间 2021-01-03 16:51
- 提问者网友：兔牙战士
- 2021-01-03 13:36
最佳答案
- 五星知识达人网友：有你哪都是故乡
- 2021-01-03 14:51
A. onceB. unless(答案→)C. whileD. if解析：句意：他们很吃惊，一个孩子竟然可以解决这个问题，而他们自己却不能。Once一旦 unless除非 while而 if如果，选C。
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- 1楼网友：痴妹与他
- 2021-01-03 16:13
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