根据句意或首字母填空。 1.  Mr Green has two sons, one is a doctor, _________ is a teacher. 2.  The shoes are too big, so I'd like to try _________ pair. 3.  This T-shirt doesn't fit me. Can you show me _________one? 4.  -Our class won the English speaking contest. -Congratulations  You _________ be very proud of it  (引以为自豪). 5.  -Is your brother playing computer games, Ted? -He m _________do that, because the computer doesn't work. 6.  Beijing is in the n_________of China. 7.  There _________ a lot of water in the r _________. 8.  He drives his c_________ fast. 9.  There are many b_________ on the lake.  We can cross the river by _________ 10.  You can't d_________ on your parents forever (永远).