What annoys(使生气) us is that he usually does nothing but about having so many things to do at weekends.
A. to plain
B. plain
C. plains
D. to plaining
网友回答
A. to plain
(答案→)B. plain
C. plains
D. to plaining
解析：句意：令我们生气的是他通常什么都不做只是抱怨在周末有那么多的事情可做。这里but当“除了”讲，当它的前面有实意动词do时，but后的动词不定式不要to，这里does是实意动词，故选B。