. Sales of CDs have greatly increased since the early 1990s, when people ________ to enjoy the advantages of this new technology.
A.begin
B.began
C.have begun
D.had begun
试卷相关题目
- 1Teenagers their health because they play computer games too much.
A.have damaged
B.are damaging
C.damaged
D.will damage
开始考试点击查看答案 - 2All of the guests by 9 o'clock , but the host until 15 minutes later .
A.arrived ; didn't turn up
B.had arrived ; didn't turn up
C.arrived ; hadn't turned up
D.had arrived; hadn't turned up
开始考试点击查看答案 - 3The hotel wasn't particularly good. But I ____ in many worse hotels.
A.was staying
B.stayed
C.would stay
D.had stayed
开始考试点击查看答案 - 4The truth, Sir, is that the old man____ across the street when my car hit him.
A.was to walk
B.had been walking
C.walked
D.was walking
开始考试点击查看答案 - 5—The twins will fly to New York with their parents this evening? ---No.In fact, their plane ___ from Shnaghai ahead of time.
A.has taken off
B.will take off
C.is taken off
D.is being taken off
开始考试点击查看答案 - 6— Have you ever worked with a tape recorder? — I ________ it a lot when I was studying French in school.
A.used
B.was used
C.have used
D.had used
开始考试点击查看答案 - 7She has set a new record, that is, the sales of her latest book ________ 50 million.
A.have reached
B.has reached
C.are reaching
D.had reached
开始考试点击查看答案 - 8--Hi, Tracy, you look tired. --I am tired. I__________ the living-room all day.
A.painted
B.have been painting
C.had painted
D.have painted
开始考试点击查看答案 - 9We ___ our new neighbors yet, so we don't know their names.
A.don't meet
B.won't meet
C.haven't met
D.hadn't met
开始考试点击查看答案 - 10— I heard they went skating in the mountains last winter. — It _____ true because there was little snow there.
A.may not be
B.won't be
C.couldn't
D.mustn't be
开始考试点击查看答案