. 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
. Sales of CDs have greatly increased since the early 1990s, when people to enjoy the adv
答案:2 悬赏:20 手机版
解决时间 2021-03-23 07:41
- 提问者网友:山高云阔
- 2021-03-23 00:11
最佳答案
- 五星知识达人网友:青灯有味
- 2021-03-23 00:36
A. begin(答案→)B. beganC. have begunD. had begun解析: when引导的是一个非限制性定语从句,when指20世纪90年代初,当然用一般过去时。
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- 1楼网友:妄饮晩冬酒
- 2021-03-23 00:50
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