---       do you go bike riding with your father?   ---Once a week.

—He’s never seen the film Rio2 (里约大冒险2) before, _________ he?—_________. He went to see it last week.

—Oh, you have a headache and a cough. __________ have you been like this?— Two days.

It’s time ______ the weather report. Turn on the radio, please. 

—You’ve never seen such a wonderful film before，_______？—No，I haven’t．