题目内容
20.It's believed that ridingbikes (bike) is good for our health and the environment.分析 人们相信骑自行车有益于我们的健康和环境.
解答 答案:bikes 分析句子,空格前是动名词riding骑,结合所给单词,故用名词与之构成动宾短语骑自行车,由于不止一辆,故用复数bikes.
点评 解答此类试题时,务必仔细分析句子的结构和句子的成分,考虑单词的适当形式.
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