It's reported that 31 of the brave young men ______ in a big forest fire in Sichuan．
I don't know who they are， but I know who they are for．（ ）
A．were killingB．were killed
C．killedD．had killed
He hardly had friends because he used to be mean．
But now he has changed a lot． He treats others _______ and is popular．（ ）
A．nicelyB．carelessC．rudelyD．heavily
Time past can not be called back again．
Yes， Wasting time is a _____．（ ）
A．pressureB．fairnessC．choiceD．shame
Lucy， you can't use the phone _______ we are far from the gas（天然气） station．
OK， I won't do that again．（ ）
A．afterB．whenC．thoughD．until
A little bird entered through the open window to join us for dinner last night．
Wow， the unexpected guest ________ welcomed．（ ）
A．will beB．must beC．won't beD．mustn't be