用括号内所给单词的适当形式填空。 小题1:This _________(feel) makes him upset all day and night. 小题2:Mother lets Michael ___________ (not watch) TV all day because the final exam is coming. 小题3:He has a lot of trouble ___________ (work) out the problems. 小题4:I love the opera, Cats. It’s so _________ (fun). 小题5:Mrs. Green seems (worry) because his son is ill.