a,the,a,an
Ⅲ1、I always wash my clothes every Saturday.
2、Now,Susan is open ing the window.
3、She had her dinner a minute ago.
4、My mother has already turned on the television.
5、The students have already sharpened their pencils.
Ⅳ1,What"s on today.
2,I have seen the film in the cinema last month.
3,Last week it has been raining in Beijing.
4,I have been to Turkey.
5,Where the autumn wheather is very bad.