I
1.a
2.a
3.b
5.b
6.a
II
1 . Lucy practiees listening  by watching English cartoons on TV
 

Exercise 13:
1.A
2.C
3.A
4.A
5.B
6.A
7.C
8.C
9.A
10.B
Exercise 14;
1.Lucy practices listening by watching English cartoons on TV.
2.Henry learns to write by writing emails to his friends.
3.My sister learns English because she wants to become an English teacher.
4.Tuan learns to read by reading English stories.
5.Peter often learns to speak English by herself.
6.How do you practise listening English?
7. I speak English with my foreign friends every day.

Ex.3 :
1) A           2) C         3) A            4) A            5) B           6) A             7) C          8) C            9) A              10) B
Ex.4 :
1) Lucy practices listening by watching English cartoons on TV
2) Henry learns to write by writing emails to his friends
3) My sister learns English because she wants to become an English teacher
4) Tuan learns to read by reading English stories
5) Peter often learns to speak English by himself
7) How do you practise listening English?
8) I speak English with my foreign friends every day