1.The mouse _____on the first floor now.A.Is.B.was.

1.The mouse _____on the first floor now.A.Is.B.was.
2.He____hard at Science.
A.try.B.trice.C.are
3.we____in.the supermarket yesterday.
A.are.B .be.C.were
4.There were many toys______the second floor.
A.In.B.on.C.to
5.We are going to____this weekend
A.swim.B.swimming.C.swims
6.today is _____Day.
A.Children.B.Children's.C.Childrens'