_____nature reserves_____ us learn more
题型:选择题
问题:
_____ nature reserves _____ us learn more about protecting animals. [ ]
A. Studying, helps
B. Studies, to help
C. Study, helping
D. Studying, help
_____ nature reserves _____ us learn more about protecting animals. [ ]
A. Studying, helps
B. Studies, to help
C. Study, helping
D. Studying, help