1、Politics ______ the art or science of government.

　　A.is　　B.are　　C.be　　D.being

　　2、My friend was very unhappy for not ______ to the concert.

　　A.to be invited　　B.have been invited　　C.to have been invited　　D.inviting

　　3、The noise was caused by a dog ______ a cat through the garden.

　　A.chasing　　B.fighting　　C.running　　D.following

　　4、I must get up earlier tomorrow morning ______ late again.

　　A.not to be　　B.not being　　C.so as not to be　　D.for not being

　　5、Because of her peculiar characteristics, she has a lot of difficulty ______ friends with her classmates.

　　A.to make　　B.making　　C.of making　　D.for her to make