问题

Scientists are working hard to make _______ possible for people to live on Mars in the future.
A:it
B:that
C:this
D:one
B:that
C:this
D:one
正确答案是:
同类题型
Rather than ____ in the restaurant many westerners prefer to get together with friends for weekends.
Don’t worry. We still have __________ time.
The paper says Iron Man 3 is on this evening. Let’s go and see it. — But I ________it.
I was ______ tired ______ I fell asleep as soon as I lay down. —Oh, you need to have a good rest.