_____ is the largest city with a population of more than four million people in Australia．（ ）
| A． |
London |
B． |
Sydney |
C． |
Paris |
﹣ I'm going on a vacation this weekend．
﹣ ．（ ）
A．The same to youB．Have a good time
C．Hurry up
Be careful，________ you'll make fewer mistakes in the exam．（ ）
A．orB．butC．and
Don't worry． We're old enough to look after ．（ ）
A．weB．usC．ourselves
﹣ Where is Linda？ I can't find her．
﹣ She her homework in the library．（ ）
A．doesB．is doingC．did
﹣ Congratulations! You won the game．
﹣ ．（ ）
A．It doesn't matterB．Thank you
C．That's a good idea