英语，选用所给动词的适当形式填空啊，速度！

27 to turn ( tell sb to do sth)
28 to post ( forget to do sth 忘记去做某事
29 sing ( hear sb do sth)
30 not to come
31 to have ( stop to do sth 停下来去做某事
32 sells
33 joined
34 be stored ( 被动事态）
35 had disappeared
36 hung
37 decorated
38 borrows
39 were picking
40 cost ( 一般过去时，cost 的过去式是cost）

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为你解答。
27．Could you tell him （to turn）the radio down？
28．Don't forget （to post）the letter tomorrow．
29．We often hear her （singing）this song in English．
30．Try （not to come）to school late from now on．
31．You have worked for two hours．You'd better stop （to have）a rest．
32．This book （sells）well．
33．My brother （joined）the League in 2001．
34．Information can （be stored）in the computers and taken out anytime needed．
35．When we went out，the young man （had disappeared）．
36．Who （hung）the bag on the wall just now？
37．He （decorated）the new house last month．
38．She often （borrows）books from the school library．
39．The people （were picking）apples when I saw them．
40．The red skirt （cost）the girl forty dollars．

27. to turn
28. to post
29. singing
30. not to come
31. to have
32. sells
33. joined
34. be stored
35. had disappeared
36. hung
37. decorated
38. borrows
39. were picking
40. costs/cost

1. to turn 

2. to post

3. singing

4. don't come

5. is sold

6. joined

7. be stored

8. disappeared

9. hung

10. decorated

11. borrows

12. was picking

13. costs
    

1. to turn

2. to post

3. singing

4. don't come

5. to have

6. sold

7. joined

8. be stored

9. disappeared

10. is hanging

11. decorated

12. borrows

13. were picking

14. costs

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