—There is something wrong with your bike,isn’t there?—Yes. I’ll have it tomorrow.
---Do you _________ lots of time exercising every day? ---Yes, it’s good for my health.
If you don’t know how to spell new words, _________ in a dictionary.
---Whose book is this? ---It________ be Ning’s because it has her name on it.
There are ______________ birds there in the sky.
I think teenagers ____________ to choose their own clothes.