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).