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 |
It didn’t ________ to me that the naughty boys should have ________ to prove what we discussed the day before.
| A．occur; set out | B．happen; set about |
| C．strike; set off | D．come up; set up |
When asked why he went there, he said he was sent there ________ for a space flight.
| A．training | B．being trained | C．to have trained | D．to be trained |
He objects to ________ the students do their homework late at night.
| A．make | B．making | C．force | D．forcing |
When I miss my family, it’s ________ great comfort to have a ________ family to be with.
| A．a; substitute | B．a; replace | C．/; substitute | D．/; replace |
─They said that we would take a camping this weekend.
─________ it rains then?
| A．What if | B．What for | C．What about | D．How come |