The students took the trouble _____ all
题型:选择题
问题:
The students took the trouble _____ all the ______ leaves away.
A.to clean, fallen
B.to clean, falling
C.cleaning, falling
D.cleaning, fallen
The students took the trouble _____ all the ______ leaves away.
A.to clean, fallen
B.to clean, falling
C.cleaning, falling
D.cleaning, fallen