问题

Man must keep in mind that it will be years ________ the earth recovers from the damage he makes to it.[ ]
A: when
B: before
C: since
D: until
B: before
C: since
D: until
正确答案是:
同类题型
The dish smells.It must be very delicious.
We’ll talk about some cases_______ drivers obviously knew the traffic rules but didn’t obey them.
Nick was __ _to talk with me last night, so I had no idea about the progress of the project
Sorry to have interrupted youPlease go on—where was I?—You ____ you didn’t like your father’s job
Are your family ready for rafting?—Yes, I really want my children to experience thatthey are young