They are said______each other long time before they met in Harvard University wh

游客2025-03-22 6

问题 They are said______each other long time before they met in Harvard University where they worked together on a research project.

选项 A、to know
B、to have known
C、knowing
D、having known

答案 B

解析 to have known不定式完成式表示过去已经发生的情况。

转载请注明原文地址:http://tihaiku.com/zcyy/4008796.html

相关试题推荐

随机试题

最新回复(0)

Don’tforgetto______yourletterbeforeyoumailit.A、fastenB、shutC、sealD、sti