根据所给首字母或汉语意思或所给单词填出正确形式

小题1:It’s not polit to s_______ at a foreigner in the street .

小题2:He is not lucky at all , on the ___________(相反), very unlucky .

小题3:To tell you the truth , I haven’t the __________ (strong ) .

小题4:We have ___________(seek) to make peace between Fred and Tom .

小题5:You should go _________ a diet and take exercise in order to keep healthy .

小题6:The boy dressed himself ______ as a policeman .

小题7:I don’t want any cakes . I’m ________(lose) weight .

小题8:It was all my ___________(过错).

接收机过载光功率定义为：在接收点处达到（）的BER值时平均接收光功率的最大值。