Someone is knocking at the door. It mysister. It’s time for her to be back.

I heard the voice,I knew that my father was coming.[ ]

Have you got any idea why Mother asks for me—She wants you to________ your staying up last night.

Few young people in China know about Lady Gaga , _______—_______, she is quite famous here in China.

22.In general， the old man is generousBut ____， he was mean to an old beggar