Do you think you will fail in the math exam —_________. I am not good at it at all.

Do you know which is______ longest river in the world

I drove to Zhuhai for the air show last week-Is that __you had a few days, off?[ ]

They have been skating __________.

Tom seems not so enthusiastic as he was two years ago. — Yes. He’s really reached a point in his career ______ he has to decide what to do next.