急求三道句型转换
问题描述：
急求三道句型转换
1、How many people are there in China?
转化成( )the population of China?
2、I find that is impossible to get there on time.
转化成 I ( )impossible to get there on time.
3、He is very happy to know that his father will come back.
转化成He is very happy ( )that his father will come back.
答
1.What is
2.find it
3.knowing