1、She paid 100 yuan for the coat .(同义句)
She （spent） 100 yuan （on） the coat.
2、Tom gets a letter from his father every month.(同义句)
Tom （hears from） his father every month.
3、The students will （decide on）(决定)the way to travel.
4、In the end ,they couldn’t （come up with）(想出)a good way to solve the problem.
5、The math problem is very hard .I am working on it ,but I can’t （work it out）.(算出)
6、That’s a （500 pages'）(500页的)book.
7、He’s too young to go to school(同义句)
He is （so） young （that） he （can't） go to school.
He isn’t （old enough to） go to school.
8、We should work hard （to catch up with） them.
9、We’ve got tickets （at） 180 yuan （for） The Sound of Music.（介词）