Dina,__b_for months to find a job as a waitress,finally took a position at a local advertising agencyA:struggling  B :having struggled 为什么不是A

they sat waiting,chatting--with--nothing in particular 为什么不是about
a serious earthquake is reported--to have struck--this area yesterday 为什么不是striking
have they taken measure to control the spread of the disease
no.they havent.they dont seem to be--a--of its danger.a.aware.b.cautious.c.afraid.d.careful
though--to have struck--money ,he managed to send her to university  为什么不是lacking

第5个是though--lack of--money ,he managed to send her to university 为什么不是lacking
第一个完成时不应该用had done吗
第三个我认为空以后用ing作定语
第四题c呢