来自冯宗宪的问题
-DoesyourgrandfatherenjoytalkingtohisoldfriendsbyQQ？-No．healwaystalks______thephone．（）A.atB.inC.on
-Does your grandfather enjoy talking to his old friends by QQ？
-No．he always talks ______ the phone．（）
A.at
B.in
C.on
