题目

完形填空Good Luck Charlie is an American television sitcom. Itis very1in the US. Most of people like to wathcit. It tells a2of an American family, theDuncans. There are3people. They are father Bob, mother Amyand four children－PK，Teddy, Gabe and Charlotte. Charlotte is the4child in the family. Shealso has5name, Charlie. The little Charlie isvery lovely. She always laughs happily and6cries. But there is aproblem. Bob and Amy can't look after Charlie every day, 7theyhave to work. So, they ask three older children to help take care of theirlittle sister. However, it is not a (n)8job for th 若三直线2x＋3y＋8=0，x－y－1=0和x＋ky=0相交于一点，则k的值是 [　　] A．－2 B． C．2 D．