Fill in the verbs in proper tense.
1. You________ (catch) the early bus if you get up early.
2. Nowadays, most science books__________ (write) in English.
3. In the past, people_______(have) to read by candlelight.
4. Father said that he ________(buy) a new bike for me the next Friday.
5. When Jack arrived, he heard Mary________(be) away for almost an hour.
6. Can you see the boy_______(carry) the heavy bag on your way to school?
7. Harry was busy________(write) letters to his pen-pal all over the world.
8. In the past twenty years, great changes ________(happen) in the small village.
9. It’s summer now. It_______(get) hotter and hotter.
10. Up till the present day, Susan with her sister_______(grow) eight trees.
11. The new model ___________(show) to us by its designer yesterday.
12. While Alice ______ under the tree, a ball knocked her head. (sit)
13. The lady told me that the truth ______to her.(explain)