Today，many winter Olympic sports__________ even by children.（ ）
A．enjoyedB．enjoy
C．were enjoyedD．are enjoyed
Lucy，could you please help me_______ the map on the wall？ We need it now．（ ）
A．put downB．put onC．put offD．put up
Is this photo taken in Tibet？
Yes，you can see beautiful snow mountains in the _______of the photo．（ ）
A．expressionB．background
C．introductionD．shape
What were Helen and Sally doing when it began to rain heavily？
Helen was sleeping _______Sally was reading a magazine．（ ）
A．whileB．untilC．beforeD．after
Mum，_____ I go out to watch a movie？
Yes，you can．But you must finish your homework first．（ ）
A．mustB．needC．willD．may
We finished the rest of the dinner ______ silence after we heard what he told us．（ ）
A．onB．atC．inD．of