Ⅰ.单句语法填空
1．In my 8th grade，I was told that I had to take an art class as a graduation requirement(require)．
2．He devoted all his free time to playing(play) the piano.
3．It's discouraging(discourage) that we were late for the wonderful film.
4．Once he makes up his mind to do it，nobody can change him.
5．There are various(vary) solutions to the global warming according to the expert.
6．The problem that he referred(refer)to just now is very difficult to solve.
7．Can you find a good way to work out the problem?
8．I was inspired (inspire)by the teacher's encouraging words.
9．I often keep in touch with my old friends by Wechat.
10．We are inspired by the scientist's devotion(devote)to the development of technology of our country.
