阅读短文，用括号内所给动词的适当形式填空。
My sister always 1_______(like) having a short rest after lunch. Today she 2_______ (sleep) when the
telephone 3_______ (ring), she 4_______ (get) up quickly 5_______ (answer) it. One of her classmates said
to her,"This is xiao Ling. I'm downstairs of your home. I want to ask you something about our homework.
What 6_______you 6_______ (do) now?" My sister answered, "This is Li Hong speaking. Nothing much.
Come up please. You are welcome." Then my sister 7_______ (open) the door to meet her.
平面相交的舌向角约为（）