At last the mother had no choice but ___
题型:选择题
问题:
At last the mother had no choice but ___________ her son herself, though she was quite busy.
A.to pick up
B.pick up
C.picking up
D.picked up
At last the mother had no choice but ___________ her son herself, though she was quite busy.
A.to pick up
B.pick up
C.picking up
D.picked up