Wateriscomposed_______hydrogenandoxygen.
A、ofA
be composed of：由 …组成。句意：水是由氢与氧化合而成的。
Theboycomplained_______apaininhisstomach.
Thebookfairhasreceivedapositive________fromreaders.
Pleaseremindme_______herthisnote.
Thefurnitureinherbedroomisquitedifferentfrom________inthelivingroom.
I'dliketoremindyouthatthereisno_____onthepartofsuspectstoanswerquestions.
