The earthquake ____ when I ____ some cle
题型:选择题
问题:
The earthquake ____ when I ____ some cleaning.[ ]
A. starts, was doing
B. started, was doing
C. was starting, was doing
D. was starting, did
The earthquake ____ when I ____ some cleaning.[ ]
A. starts, was doing
B. started, was doing
C. was starting, was doing
D. was starting, did