Definition: the central point in a period of time Level: B1
这封信应该在下周中之前到达。
The letter should arrive by ___the ___middle of next week.
噪音在半夜把我们吵醒了。
The noise woke us up in ___the ___middle of the night.
有一次，她在半夜醒来，听到外面有奇怪的声响。
Once, she woke up in ___the ___middle of the night and heard a strange noise outside.
