用括号里的词的适当形式填空。 1.I’d like ______ (organize) a party. 2.She _______ (play) the piano for 2 hours. 3.When I was twelve,I _______ (start) to play tennis. 4.My brother has been swimming since he _______ (be) 7 years old . 5.Their apartment is on the _______ (nine) floor of the building . 6._______ (luck),Fred was not hurt in the car accident . |