Even professional marketers are never sure ______some new products are runaway s

游客2025-06-15 33

问题 Even professional marketers are never sure ______some new products are runaway successes while others fail miserably.

选项 A、for
B、why
C、since
D、whoever

答案 B

解析 sure的用法为be sure of／about sth．或be sure+从句。答案是(B)why。

转载请注明原文地址:http://tihaiku.com/zcyy/4119033.html

相关试题推荐

随机试题

最新回复(0)

Intoday’srapidlychangingworld,noprofessionalcan______topassuptheoppor