2.

a. You ought to study harder.

b. You ought to get up earlier.

c. You ought to go on a diet./ You ought to eat more fruit.

d. You ought to go to a dentist.

3.

a)

Miss. Lien: Did someone help Ba draw that picture?

Bao: No. He did it (0) himself.

b)

Nga: The repairman can't fix the washing machine until tomorrow.

Mrs. Linh: Come on. We'll have to try and do it (1) ourselves.

c)

Aunt Thanh: What's the matter, Hoa?

Hoa: I cut (2) myself.

Aunt Thanh: Let me see. Oh, it's all right. You didn't cut (3) yourself badly.

d)

Lan: Why are you crying, Nga?

Nga: I just watched the movie Romeo and Juliet. The boy killed (4) himself and then the girl killed (5) herself as well.

Lan: Why did they kill (6) themselves?

Nga: It's a long story.

e)

Mr. Nhat: Boys and girls, you'll go this experiment this afternoon.

Students: Will you come to help us?

Mr. Nhat: Yes, I will. But you'll have to do it (7) yourselves first.

4.

a. Why did Hoa go to school late this morning?

Because she watched TV late last night.

b. Why does Nam have to cook dinner?

Because his mother will be home late.

c. Why does Mrs. Thoa/ Nam's mother go home late?

Because she has to come to see her mother. Maybe she's ill.

d. Why did Hoa fail her English exam?

Because she didn't learn her lesson carefully.

e. Why can't Nga go to the movies?

Because she has to clean the house

I,

a) You ought to study harder

b) You ought to get up earlier

c) You ought to eat more fruit

d) You ought to go to a dentist

II , (1) himself

(2) ourselves

(3) (myself

(4) yourself

(5) himself

(6) herself

(7) themselves

(8)Yourselves