Ⅰ.单句语法填空
1．Cheng Long, ________ (know) as a film star, is very popular in the whole world.
2．The city, ________(situate)on the coast of the Yellow sea, has become a modern industrial center.
3．________(face)with a difficult situation，Arnold decided to ask his parents for advice.
4．We have fifty workshops in our factory，but only one fifth ________ (be) able to be used and the rest stand empty.
