问题补充:
“thanks” is polite when someone has done you a favour, but saying it too often is quite another thing.
A. Though saying
B. If saying
C. Saying
D. In spite of saying
答案:
A. Though saying
B. If saying
(答案→)C. Saying
D. In spite of saying
解析:句意:当别人帮你忙的时候,说“谢谢”是礼貌的,但是说的太频繁又是另外一件事。这里第一个is是谓语,前面的是主语,用动名词做主语,所以选C。