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
﹣Who lives together with your grandmother？
﹣﹣______．She lives alone．I often go to see her．（ ）
A．NobodyB．SomebodyC．AnybodyD．Everybody
﹣Why don't you buy the sweater？
﹣﹣It's too ____，and I don't have enough money to buy it．（ ）
A．niceB．expensiveC．popularD．cheap
Thanks for inviting ______ to your food festival．We really enjoyed ourselves．（ ）
A．weB．theyC．themD．us
Lang Lang is ______ famous pianist．He plays ______ piano very well．（ ）
A．a，theB．the，theC．the，/D．a，/
Would you mind my opening the window？
______，I've got a cold．（ ）
A．Never mindB．You'd better not
C．All rightD．With pleasure