Question

19．Air pollution is serious in China，forcing the government to introduce/which forces the government to introducealternate driving days in China's capital．（force）
空气污染在中国很严重，迫使政府在中国首都引入交替开车的日子．

Answer 1

分析 Air pollution is serious in China，forcing the government to introduce/which forces the government to introduce alternate driving days in China's capital．

解答 本句描述的是空气污染带来的影响，所以用一般现在时即可．
句子为复合句，forcing the government to introduce alternate driving days in China's capital为现在分词短语作结果状语，也可以用定语从句which forces the government to introduce alternate driving days in China's capital．
force sb to do sth意为迫使某人做某事．alternate driving days 交替开车的日子．

点评 本句中注意现在分词的正确使用，因为大气污染和迫使政府引入交替开车的日子为逻辑上的主谓关系，所以用现在分词．