My father was reading a newspaper while my mother ______dinner.
A.is cooking B.cooks
C.was cooking D.to cook
--How many students are there in the classroom?
--___________.
A.No B.No one C.None D.Nobody
Sandy spent too much time _________ computer games.
A.playing B.to play C.played D.play
Please _____ who broke the window.
A .find out B.find C.look for D.look out
I enjoy learning English, it takes me a lot of time.
A.as if B.though C.because D.for
There used a tree in front of the house, but now it is cut down.
A.be B.have C.to be D.to have
