The author of the passage advises us _________
A. to use words carefully and accurately B. not to use silly and rude words C. to become a slave of words D. to use emotional words
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我国现行建筑安装工程费用构成中,材料二次搬运费应计入()。
A. This B. That C. What D. Which
Sorry, I don’t know he is a friend of _________.
A. your brother B. your brothers C. your brother’s friend D. your brother’s
It is believed that the widespread use of the “grid”will become possible in the next________.