
I often visited Tian an Men Square ________ I was staying in Beijing.
A until
B during
C while
D throughout
I often visited Tian an Men Square ________ I was staying in Beijing.
A until
B during
C while
D throughout
C
while引導(dǎo)時間狀語從句,強調(diào)一段時間內(nèi)正在發(fā)生的事,和進行時連用。
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