How much did the computer ________ you? And how much time do you ________ on it every day?

Where is Mr Green now ? I haven’t seen him for a few days .—He _____ to Hong Kong .

The young boy is good _____ me. He is good _____ playing basketball. He often tells me that it is good _____ my health to do more exercise. [ ]

We have to__ourselves when we are away from home.

Fish ________ without （没有）water .