The project will help people understand the many threats to the natural environment ________ endangered plants and animals live.
| A．which | B．when | C．where | D．that |
I find painting and listening to music __________.
| A．relaxing | B．is relaxing |
| C．relaxed | D．are relaxed |
—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 |