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
