高中时态专项练习1. Sales of CDs have greatly increased since the early 1990s, when people to enjoy theadvantages of this new technology.A. beginB. beganC. have begunD. had begun2. Turn on the television or open a magazine and you advertisements showing happyfamilies.A. will often seeB. often seeC. are often seeingD. have often seen3. I hear Jane has gone to the Holy Island for her holiday. Oh, how nice! Do you know when she ?A. was leavingB. had leftC. has left D. lef
