2020届高考英语一轮复习语法专项突破4介词和介词短语含解析牛津译林版

答案：In their opinion, if too many people keep pets at home,it will be harmful the environment.

for to解析：句意:他们认为,如果太多的人在家养宠物,那会对环境有害。be harmful to为固定短语,意为“对……有害”。

12答案及解析：

答案：Back in those of my college days, a professor introduced me to a wealth of Confucianism and Taoism.

解析：句意:早在我上大学时,一位教授就让我了解了大量的儒家和道家的思想:introduce sb.to sth.表示“使某人了解某物“,故需在me后加介词to。