I would have come earlier, but I _____ that you were waiting for me．
| A．didn’t know | B．hadn’t known |
| C．haven’t known | D．wouldn’t have known |
—I usually go there by train.
—Why not __________ by boat for a change?
| A．to try going | B．trying to go |
| C．to try and go | D．try going |
Having been ill in bed for nearly a month, he had problems __________ the exam.
| A．pass | B．passing |
| C．to pass | D．passed |
It was so dark that he __________.
| A．didn't dare to go out to fetch some water |
| B．not dared to go out to bring some water |
| C．dares not to go out to bring some water |
| D．not dare to go out to fetch some water |
The Wangs are considering __________ to Huangshan for a trip at five tomorrow morning.
| A．to move off | B．moved off |
| C．moving off | D．move off |
The rule is true __________ all cases.
| A．about | B．on |
| C．of | D．to |