---Tom’s father looks very serious.
---___________ he is very kind.
| A．Though | B．If | C．And | D．But |
He_____his computer last year. I _____ my computer for over ten years. It still works OK.
| A．bought ,have bought | B．have bought , bought |
| C．bought, have had | D．have had, bought |
---Look at the boy running on the playground. Is it David?
---It ______ be him. I saw him go to the teachers’ office just now.
| A．mustn’t | B．can’t | C．couldn’t | D．must |
---How long __________ your parents ___________?
---For about twenty years.
| A．did, marry | B．have, married |
| C．have, got married | D．have, been married |
The weather in Hong Kong is quite different from __________ in Beijing.
| A．it | B．them | C．that | D．those |
What_____you_____at nine yesterday morning?
| A．have, done | B．did, do | C．were, doing | D．do, do |