高中时态专项练习及答案

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高中时态专
项练习1. 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
2. Turn on the television or open a magazine and you ________ advertisements showing happy families.
A. will often see B. often see
C. are often seeing D. have often seen
3. —I hear Jane has gone to the Holy Island for her holiday.
—Oh, how nice! Do you know when she ________?
A. was leaving B. had left
C. has lef ...

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关键词：Television advantages Technology Increased Technolog