. Sales of CDs have greatly increased since the early 1990s, when people ________ to enjoy the advantages of this new technology.
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A
begin
B
began
C
have begun
D
had begun
推荐题目
This is the first time that I ______ at the meeting.
#101848
A
had spoken
B
have spoken
C
has speaking
D
was speaking
Professor Williams keeps telling his students that the future to the well- educated.
#102000
A
belongs
B
is belonged
C
is belonging
D
will be belonged
Justin a book about his adventures in Tibet．I hope he can find a good publisher when it is finished．
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A
was writing
B
is currently writing
C
has already written
D
wrote
The oranges____ nice ,but_____badly this year.
#104896
A
are tasted; aren’t sold
B
taste;sell
C
are tasted; sell
D
taste; are sold