We all like Mr. Zhou ______ he is so kind to us.

－Can I justhave a try?－Sure. Itdoesn’tif you give a wronganswer.

Perhaps the day will come ____ people willbe able to breathe clean air in cities

hat’s the matter with Jason Helooks a bit upset— Didn’t you know When returning fromhis holiday last night, he found his house _____

ground _______ the man, his face aswhite as a sheet of paper.