Professor Johnson is said ------some significant advance in his research in the past year. ( )
A having made
B making
C to have made
D to make
请说明详细原因,谢谢!
Professor Johnson is said
答案:1 悬赏:40 手机版
解决时间 2021-08-21 02:35
- 提问者网友：謫仙
- 2021-08-20 02:48
最佳答案
- 五星知识达人网友：胯下狙击手
- 2021-08-20 03:10
C
此处使用不定式作非谓语动词,因为主句的位于是said而且时间是in the past year所以应该用现在完成时.
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