The public transportation is very convenient in that big city , so there______be any difficulty in traveling around .

—Catherine, I have cleaned the room for you.—Thanks, you __________it. I could manage it myself.

–Look! Someone is cutting a tree on the moon.–It _______ be true, Granny. Our teacher says there is no air there.

One of our rules is that every student_____wear the school uniform while at school．

 --Will you read me a story, Mummy?--OK. You ________have one if you go to bed as soon as possible.