----Shall I go and buy two more bottles of beer? ----No, I’ve already bought them yesterday. That           be enough for us two.

Teachers        be sensitive to the development level of each student so as to help them better.

— I’m a little tired. Let’s go to the zoo by taxi.  —We ________take a taxi. It’s not far from here.

 You can’t imagine that a well-behaved gentleman _____ be so rude to a lady.

We _______ play on this road. There is too much traffic.