Don't throw litter around. Please _____
题型:选择题
问题:
Don't throw litter around. Please _____ . [ ]
A. pick it up
B. pick up it
C. pick up them
D. pick them up
Don't throw litter around. Please _____ . [ ]
A. pick it up
B. pick up it
C. pick up them
D. pick them up