In Switzerland，things like glass and plastic into different groups and then recycled（ ）
A．separateB．separated
C．are separatedD．is separated
What's up， Tony？
Well， Mr． King， could you tell ______？（ ）
A．how did you learn history
B．when the art festival is
C．where were you yesterday
D．what are they drawing
When will Sally and Carol arrive？
I don't know． I have ______here for half an hour．（ ）
A．comeB．leftC．waitedD．arrived
Eric， ______playing that computer game． Why not read a book？
OK， Mom．（ ）
A．to stopB．stoppingC．stopsD．stop
Paul and Dale have ______in common， although they are brothers．（ ）
A．somethingB．anythingC．everythingD．nothing
Would you like to come to my party next Sunday？
I'd love to， but I ______． I have an important meeting that day．（ ）
A．can'tB．mustn'tC．needn'tD．shouldn't