Thepupilshere_____allkindsofexerciseseve
题型:选择题
问题:
The pupils here_____ all kinds of exercises every day in the past few weeks.
A.keptbusydoing
B.keepondoing
C.havekeptbusydoing
D.havebeenkeptbusydoing
The pupils here_____ all kinds of exercises every day in the past few weeks.
A.keptbusydoing
B.keepondoing
C.havekeptbusydoing
D.havebeenkeptbusydoing