Someone is knocking at the door. Is it Ann?—It _____ be her. She is giving a performance at the theatre now.

Why does she always ask you for help? —There is no one else ______, is there?

She started to work a teacher in India in 1929.[ ]

Would you like something to drink?－No, thanks. I __________ a glass of water just now.

I _______ 2 hours finishing my homework last weekend.