Betty, what are you doing now? —I’m waiting ____________ the bus. It takes me to school every morning.[ ]

Tom ________ a letter from Terry for a long time.

Who will _______ the baby when your aunt is away?—Nobody but me.

Excuse me, but could you please turn the radio down?——Sorry, I _________ you could hear it.

There ____ a talk show on CCTV-4 at eight this evening .