—Why won’t you go on a trip to the Great Wall with me? —Because I there.
Regular exercise is important, ______ it's never a good idea to exercise too close to bedtime.
_______, if you are_______, you can share with us and make music.
I want to buy a good CD but_______ was available from the shop.
My friends have given me lots of_______.They're very useful.
The teacher came into the classroom ___ a smile on her face.A. in B. to C. with