во сколько раз увеличится объем конуса , если радиус его основания увеличить в 4 раза , а высоту оставить прежней ???

 Complete the dialogue with the Present Perfect form of the words below. 

buy   do   lose   meet  start

Ann: Hi Rose. How ate you?

Rose: I feel really relaxed because I _______ my holidays. 

Ann: You look fantastic _________ you _______something to your hair? 

Rose: No, I haven't.  But I _________five kilos.  My brother wants to get fit so he ______a new bicycle and we go cycling together every day. 

Ann: How is your brother? 

Rose: He's very happy.  He _______ a lovely girl.