________ I think he is Charles.
| A．Who do you think he is | B．Do you think who he is |
| C．Whom do you think he is | D．Do you think who he is |
- You must have missed the last train to Guangzhou the other day.
- Oh, no, I _____.
| A．haven’t | B．hadn’t | C．don’t | D．didn’t |
The accident has reached a point _____ the police have to be called in.
| A．when | B．that | C． which | D．where |
As a new graduate, he doesn’t know ______ it takes to start a business here.
| A．how | B．what | C．when | D．which |
Do you know ____ or not Maggie will go to the cinema with us tonight?
| A．that | B．if | C．what | D．whether |
Do swim with others. Otherwise, you _________.
| A．can get drowned | B．will get drowned |
| C．might have got drowned | D．might get drowned |