This is a process happens when land becomes desert people cut down trees and dig up grass.
| A．when; because | B．that; because of | C．when; because of | D．which; because |
The way she dealt with the problem is quite different _______ her parents were used to.
| A．from which | B．in what | C．in which | D．from what |
. —She ’s failed her test again.
—________. She has been studying very hard.
| A．I don’t think so | B．Don’t worry | C．Why not ? | D．What a shame |
---When did you see the bird last night?
---It was at about ten thirty ______ I got home.
| A．before | B．when | C．that | D．until |
—I’m afraid I can’t afford a ticket to the concert, so I won’t be able to go with you.
—Don’t worry. It’s my ________.
| A．pleasure | B．treat | C．business | D．invitation |
—Hi, Li Xiaoxia. What a surprise! Dad _____ you _______ so early. He’s upstairs reading. I’ll just call him.
| A．didn’t know; would come | B．doesn’t know; are coming |
| C．hadn’t known; were coming | D．hasn’t known; will come |