Everyone knows the Yellow River isn't so as the Yangtze River．（ ）
| A． |
long |
B． |
longer |
C． |
longest |
What are you doing？
I'm looking ______ the kids． They should be back for lunch now．（ ）
A．afterB．atC．forD．up
Do you still play basketball？
Oh， no． I ______ it for the past three years．（ ）
A．haven't playedB．didn't play
C．won't playD．hadn't played
I still don' t know what____ while I was away from home．
You'll know it all some day， l believe．（ ）
A．had happenedB．would happen
C．has happenedD．happened
My sister______ the piano very well， but she hasn't had time to play recently．（ ）
A．will playB．has playedC．playedD．plays
It's very kind of you to help me． Thank you very much．
______．（ ）
A．Thank you
B．Don't thank me
C．Sorry to help you very little
D．You are welcome