单项选择题

儿童时期患佝偻病,是因为缺乏()。

A.维生素B1
B.维生素C
C.维生素D
D.维生素A

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单项选择题
房地产经纪机构发布所代理的( )广告时,应当提供业主委托证明。 A.公有住房项目 B.新建商品房项目 C.二手房房源 D.存量房房源
A.公有住房项目
B.新建商品房项目
C.二手房房源
D.存量房房源
单项选择题
W:If you’re in a hurry you can take the subway. If you want to sightsee,take a bus.M:Actually,I don’t have to be at the convention before noon.Q:What will the man probably do?()

A.Take the subway.
B.Take a bus.
C.Take a taxi.
D.Hurry to the convention.

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