单项选择题
The English play（）my students acted at the New Year’s party was a great success.
A.for whichB.at whichC.in whichD.on which
单项选择题 Alec asked the policeman（）he worked to contact him whenever there was an accident．
单项选择题 Yang Liwei,（） we all feel proud, appeared on the Spring Festival Evening．
单项选择题 They have nothing（）with one another.
