房屋建筑和市政基础设施工程施工招标的合同订A（）日之内，中标人应将合同送县级以上工程所在地的建设行政主管部门备案。
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乙级工程监理单位资质条件中，企业负责人和技术负责人应具有（）以上从事工程建设的经历。
A. 3年
B. 10年
C. 20年
D. 5年
Why does Mr. Smith never de any housework
A. [A] He is lazy.
B. [B] He is very' busy.
C. [C] He can drive a truck.
The movie wasn't very interesting, but ______it was not expensive.
A. [A] on the other hands
B. [B] in the other hand
C. [C] on the other hand
There are ______tigers in the forest, and only a small number of monkeys.
A. [A] a great number
B. [B] a few of
C. [C] a great number of
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