A: I am sorry I _________(forget)toreturn your physics book last night.B: I'll forgive you considering the test isn't until Friday.
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The cold air______(chill) me to the bone. Please turn off the air-conditioner.
The old professor ________(step) into the classroom, ________(open) the book and ________ (begin) to teach.
A: I______(think) you______(be) going to call me last night about the train schedule.B: Sorry. I would have. But Harry and Jack stopped by and stayed past midnight.
房地产开发企业的基本活动包含了以下哪个内容( )。
A. 开发商品房
B. 承包工程
C. 批发商品
D. 零售商品