-- John, it's 10 p.m. It's time to go to bed now.-- OK, ______, Mum!
We need two singers________our shool show.
I can’t sing________dance,but I can swim________skate.
What does your sister like,music,art________sports?
—Hello!________? —Linda.
—________do you want to join the music club? —Because(因为)I like music and playing the guitar.