An advertisement is useful in_____ it can persuade customers to buy the kinds of goods in the shop.
Work hard at your lessons, and you’ll ____ your classmates.
There’s ____ water on the playground, so we won’t have the P.E. class there.
Is there ____ in today’s newspaper?
He’s already left here. You ____ have come here half an hour earlier.
Could you give me ____ on how to learn English?