...spoken我选择了mustn't have spoken,而正确答案是A。并且给出的解析是:1.没有mustn't have done 这个结构。2. couldn't have
done 能够表示当时绝不可能。就此我想请网站各位专家老师问题:1. mustn't have
done 没有此结构吗?但是我在 google...
...is first quarter, China had about 1,100 or so.
e-commerce websites这道题的正确选项是A,但是"截止到某一段时间"不是应该用完成时吗?原句和B选项我也不知道错哪里了……另外by the first
quarter of this year和by the end of the first quarter of this year我觉...