Theboycomplained_______apaininhisstomach.
A、withD
complain of ：抱怨，说自己有病。句意：这孩子说他肚子痛。
Jennycomplainedthatthehospital________hertoomuchforthetreatment.
Thefurnitureinherbedroomisquitedifferentfrom________inthelivingroom.
Itisdifficultto________theimplicationbetweenthelines.
Thenewdiscovery_______beofgreatservicetomankind.
Ittookmeamonthtogetrid_______thecough.
