问题
We arrived home at 9：00 in the evening, ________most people had already had supper.[ ]
A:at that time
B:by that time
C:at which time
D:by which time
B:by that time
C:at which time
D:by which time
正确答案是：
同类题型
You should go over your test paper _____ you hand itin.
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Would you please _______ the paper for me and see if there are any obvious mistakes?
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