Ex 15

1, She is in hospital because she had an accident.

2, They work many hours but they don't have much money.

3, Paul asked me for a question, so I replied.

4, I buy tomatoes, pepper and potatoes.

5, She can't have an apple or a mango. She can have both of them.

6, Karthick can play the piano but he can't play the violin.

7, She is hard-working but her brother is lazy.

8, She is beautiful and clever

9, You can take the blue shirt or the green shirt.

10, My sister is tall but I am short.

Ex 16

1, Twice a year.

2, A toothbrush and fluoride toothpaste.

3, Wooden toothpicks.

4, Healthy food such as milk, vegetables,....

5, Sweet food