Review of uiit 1-21. terrible , volleyball, have a rest, see a doctor, take care of.2. (1) show /give me a massage(2)breaking, It’s nothing./never mind./It doesn’t matter.(3)not playing soccer inside(4)I didn’t pass./I faild. Oh,never mind./It doesn’t matter3. e, a, b, d, c.4. (1) You should /You’d better have a rest./ Why not have a rest?(2) You should /You’d better say sorry to her.(3) You should /You’d better take an umbrella./ Why not take an umbrella?(4) You shouldn’t eat so much candy.5. can’t, may, must, Must, needn’t/don’t have to , can/may6. goes, went, had, are playing, are dancing, will come/are coming, won’t do /are not going to do, will play/ are going to play, will learn/ are going to learn, says.7. F, T F T8. (1)No,it isn’t. (2) Yes, they are. (3) They may become sick or even die. (4)They should put medicine away or keep it in a high place.9. (1) Greece, (2) No, they couldn,t. (3) They started in 1896. (4) Every four years. (5) Faster, higher, strong . Yes, Its Chinese is 更快，更高，更強。（6）略。10. coughs, went, herself, have to, ask for.