did she complain about the food 这里为什么加about

complain 有俩种用法
1）当时及物动词时,后边加句子
如：
He complained that the examination was too hard.
他抱怨考试太难了.
2）当不及物时加about 后边才可以加宾语哦·
如：They never complained about working overtime.
他们对加班加点从来不抱怨.
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