Professor Johnson is said ______ some significant advance in his research in the

游客2024-10-28 47

问题 Professor Johnson is said ______ some significant advance in his research in the past year.

选项 A、having made
B、making
C、to have made
D、to make

答案 C

解析用不定式的完成时表示过去意义。

转载请注明原文地址:https://tihaiku.com/zcyy/3821443.html

相关试题推荐

随机试题

最新回复(0)

Thescientistshaveabsolutefreedomastowhatresearchtheythinkisthebest