45.How long have you been______(skate)?For five hours.46.The

45.How long have you been______(skate)?For five hours.46.The students are
45.How long have you been______(skate)?For five hours.
46.The students are cleaning the streets_______(raise)money for charity.
47.I'd like tocollect stamps because they are _______(interest).
48.They have_______(run)out of all the food.
49Do you often have your hair _______(cut)in that barber shop?.
50.On her _______(nine)birthday.Jenny got a big surprise.
51.What topic are the young ladies________(interest)in?
52.In his composition________(common)word is but.