It_______ ten years since Professor Du last_______ to the earth.
| A．was； came | B．has been； come |
| C．was, come | D．is； came |
Mike's father_______ to London last month. He_______ there three times.
| A．went； had gone | B．has gone； has been |
| C．went； has been | D．has been； had gone |
He used ____on the right in China, but he soon was used____on the left in England.
| A．to drive； to drive | B．to drive； driving |
| C．to driving； to drive | D．to drive； to driving |
--- Do you mind if I take the seat next to yours?
--- ______________. It hasn’t been taken yet.
| A．Of course not. | B．Yes, I do. |
| C．Better not. | D．No, I’m afraid not. |
---Excuse me, sir. You can’t take photos here. Look at the sign.
---Sorry. I ______________ the sign.
| A．haven’t noticed | B．don’t notice |
| C．didn’t notice | D．won’t notice |