Choose the best answer A, B, C or D to complete the sentences:

1. New York is an__________ city with many skyscrapers.

A. exciting   B. excited    C. interested          D. unpopular

2. His father might__________ to Australia for his holiday.

A. went       B. going      C. goes                 D. go

3. Peter stayed at home__________ he was ill.

A. but          B. so          C. because            D. and

4. “Let’s go fishing.”- “__________ don’t we go fishing?”

A. What      B. Why      C. When     D. How

5. Robots won’t take care__________ children.

A. of            B. after        C. on           D. off

6. __________ pollution causes breathing problem.

A. Water B. Noise C. Air D. Deforestation