I.

1.to>for

2.should>shouldn't

3.don't>doesn't

4.a>an

5.has>have

6.feels>feel

7.shouldn't>should

8.eated>ate

9.speaks>speak

10.are>is

11.did go>went

12.an>a

13.bad>good

14.doesn't>don't

II.

1.b

2.c

3.a

4.c

5.d

6.b

7.a

8.c

9.a

10.b

11.a

12.c

13.b

14.a

15.c

16.c

17.c

18.a

19.d

20.c

III.

1.six

2.because they much study too much everyday, and don't have enough time to take a rest

3.students should play sports after school to relax

4.because it's necessary to development of their brain

5.Yes,it is

1. sai " to  " sửa đúng là "with"                           10."are" sửa "is"

2. "should" sửa "shouldn't                                   11."did go" sửa "went"

3. "don't" sửa "doesn't"                                        12. "an" sửa "a"

5. "has" sửa "have"                                                13."bad"sửa "good"

6."feels" sửa "feel"                                                14. "doesn't" sửa "don't"

7.shouldn't sửa "should" 

8."eated" sửa "ate"

9."speaks" sửa " speak"

  phần 2 la mã : 1. B             2. C    3. A       4. C       5. D    6.B           7. A     8.C    9.A       10.B

11.A       12.C   13.A  14.A        15.D       16.B     17.C   18.A        19.D       20.C