V. Choose the correct word A, B, C or D for each  gap to complete the following passage.

Our future house will be on the Ocean. It will be surrounded by tall trees and blue sea but we only have salt in the ocean. We need fresh water for (1) __________ and for growing food (2) ___________ farms.

          Ocean water is too salty (3) ___________ It is also too salty for watering plants. We must have the (4) ___________ to make fresh water from salty water. We should be ____________(5) not to waste water.

1. A. drink

B. drinking

C. to drink

D. to drinking

2. A. in

B. on

C. at

D. into

3. A. drink

B. drinking

C. to drink

D. to drinking

4. A. things

B. suggestions

C. ways

D. ideas

5. A. careful

B. careless

C. carefully

D. carelessly