Choose the correct answer to complete the sentence.

1. I think that he people ______ live in cities under the sea in the future.

A. will                  B. should     C. must       D. have to

2. Astronaut’s lives are very different on a ______.

A. Floating  B. space station    C. spacesuit          D. the earth

3. If I have time, I ______ go to the opera house.

A. Have       B. has          C. will have D. having

4. “What can we do there?” – “______ ”

A. We can go hiking there                  B. It takes us 2 hours to go there

C. We can go there by bus         D. We can go to the Green Mountain

5. “Where are you going on holiday?” – “______ ”

A. I’m going to visit Tokyo Tower     B. I sometimes go to the library

C. Yes, of course                      D. I’m going with my mother