用所给单词的适当形式填空。

l. Mr Brown _____ (go) to his office by bike every day.

2. Why not _____ (go) to the zoo by bus?

3. It ____ (take) about 15 minutes to walk.

4. There _____ (be) many deer in the forest now.

5. There must _____ (be) many sheep.

6. Kate is walking to her home ____ (quick).