
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(shí)間狀語(yǔ)從句,強(qiáng)調(diào)一段時(shí)間內(nèi)正在發(fā)生的事,,和進(jìn)行時(shí)連用,。
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