—So far, how long _________ you _________China? —For one year.
-_____ have you worked? -Since 2 pm.
We can’t work out the physics problem. Can you tell us ________?
We’ll go shopping if it ________ rain tomorrow.
–Whatdidyourmothersay,Tom? -Sheaskedmewhy___.
His money ________, so he had to walked home.