I had been working on math for the whole
题型:选择题
问题:
I had been working on math for the whole afternoon and the numbers before my eyes. [ ]
A. swim
B. swum
C. swam
D. had swum
I had been working on math for the whole afternoon and the numbers before my eyes. [ ]
A. swim
B. swum
C. swam
D. had swum