Theworkersmadecontributions
问题详情:
The workers made contributions__________ the environment.
A. protect B. to protect C. to protecting D. protecting
【回答】
C
知识点:动词和动词短语
题型:选择题
问题详情:
The workers made contributions__________ the environment.
A. protect B. to protect C. to protecting D. protecting
【回答】
C
知识点:动词和动词短语
题型:选择题