— We couldn’t find you anywhere around 8 o’clock yesterday evening.— I’m sorry for that. I _____ in the supermarket then.
—Can you play foot ball? —________.It’s hard.
In some Western countries shops are closed ________ weekends.
Our teacher always helps us ________ our English.
The desk is not dirty.You ________ clean it.
He is very good ________ the children.