1 . They have huge amounts of work to do every day, but they never c______ about the workload. (根据首字母单词拼写)

2 . The office was crowded with people c________ (抱怨) about the washing machines. （根据中英文提示填空）

3 . I’m most unwilling to c________, but the frequent interruption of your assistants is really annoying. （根据首字母单词拼写）

4 . Steven is always made to do the most difficult jobs and gets the lowest salary, but he never ________(抱怨). (根据汉语提示单词拼写)

5 . That is why Letters from Father Christmas could be the perfect book for those who ______ Christmas as a special time of year.

A．regard

B．think

C．admit

D．complain