Do you know the cost of buying a house in Shanghai is much higher than __ in Tibet? —Of course, I know. It’s impossible for me to buy_____ there.

His mother often helps him ___ English so he does better ___ English than others. [ ]

How many students are there on the playground? —_________.

Elvis Presley has sold more than one records all his life.

Go to _______/bed/ early, please. It is good for your health.