You won’t surf the internet before you finish your homework, ______ you? [ ]

Itwas just a ________remark – Iwasn’t really serious.

I think running is an easy way to keep healthy.—— __________ , but Bill doesn’t think so.

I don’t think The Flowers of War by Zhang Yimou is popular among teenagers, _________?

He kept yawning in class this morning. That is _____he stayed up late doing his homework last night.