水排的发明者是[ ]
A.王景
B.鲁班
C.杜诗
D.李冰
答案:C
The police ______ for the lost child everywhere.
A.is looking
B.has looked
C.are looking
D.are looked
—When do you have science?
—I have science ________Tuesday and Friday. [ ]
A. in
B. on
C. at
D. about