By the time Call Mate Inc. finished testing its video cell phone, several compet

游客2025-06-13 39

问题 By the time Call Mate Inc. finished testing its video cell phone, several competing firms______similar models.

选项 A、have launched
B、had launched
C、were launched
D、will launch

答案 B

解析在做有关时态的题时，首先要仔细分析前后句。该句直译过来是“在几个竞争公司已经将类似模式投放市场之后，电话公司才进行产品测试”。所以主句应该用过去完成时。正确答案是(B)had launched。

转载请注明原文地址:http://tihaiku.com/zcyy/4116636.html

相关试题推荐

随机试题

最新回复(0)

To:SalesMangersFrom:DistrictManagerAsyouknow,wehavespokenonseveral