The boys knew they had broken the rules, and they were ______ but happy when called to the office. A

The boys knew they had broken the rules, and they were ______ but happy when called to the office.
A. nothing B. anything C. something D. everything
【答案】B
【解析】
【详解】考查固定短语。句意：男孩们知道他们违反了规定，当被叫到办公室时，他们一点也不高兴。短语anything but“根本不；一点不”。故选B。