问题补充:
I had been working on math for the whole afternoon and the numbers before my eyes.
A. swim
B. swam
C. swimming
D. had swum
答案:
A. swim
(答案→)B. swam
C. swimming
D. had swum
解析:句意:我一整个下午都在做数学题,那些数字在我的眼前转。主句用过去完成进行时,所以后半句用一般过去时,只有这样才能具备“过去的过去”的条件。选B。
如果觉得《I had been working on math for the whole afternoon and the numbers before my eyes.A. swim》对你有帮助,请点赞、收藏,并留下你的观点哦!