Many American drives form car pools, with three or four people __________ to drive to the place where they all work.
A.take turns
B.taking turns
C.took turns
D.taken turns
正确答案是B
Many American drives form car pools, with three or four people __________ to drive to the place where they all work.
A.take turns
B.taking turns
C.took turns
D.taken turns
正确答案是B