来自陈新胜的问题
【Myfatheroften________histeeth______halfpastseveninthemorning．（）A.brush；atB.brushes；atC.brushs；onD.brushes；in】
My father often ________ his teeth ______ half past seven in the morning．（）
A.brush； at
B.brushes； at
C.brushs； on
D.brushes； in
