Question

动词填空。。。。。英语高手帮忙。。。

1、Many great changes( )(take)place in China during the past 10 years
2、We should think about all we can do （）（prevent）animals and plants from becoming endangered
3、Jack and Susan （）（know）each other since they were children ，so nobody was surprised to hear that they got married

Answer 1

1. have taken .during the past 10 years在过去的十年来，所以用现在完成时。
2.to prevent 表示目的：为了……
3.have known
加油！

Answer 2

1、Many great changes( have taken )(take)place in China during the past 10 years
2、We should think about all we can do （to prevent ）（prevent）animals and plants from becoming endangered
3、Jack and Susan （have known）（know）each other since they were children ，so nobody was surprised to hear that they got married

Answer 3

1.have taken
2.to prevent
3.have known

Answer 4

1. have taken
2. to prevent
3. have known

Answer 5

1.have taken
2.to prevent
3.had known

Answer 6

1、have taken
2、prevent
3、have known