—What happened to the young trees we planted last week?
—The trees _ well, but I_ them．
| A．might grow; hadn't watered | B．needn't have grown; didn't water |
| C．would have grown; didn't water | D．would grow; hadn't watered |
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 |
David was very unhappy for ____ to the party which was held in his cousin’s house.
| A．having not been invited | B．not having invited |
| C．not having been invited | D．having not invited |