He must have been annoyed by something yesterday, _____?

The student must be working very hard, ________?

There is little doubt in your mind that he is innocent, ________？

We don’t believe the baby is badly ill,__________?

—I don’t suppose Jimmy could have done well in the mid-term exam last week,______?--- ______ he almost failed in the exam．

 ---My Dad began to teach me English when I was eight.---Wow. You must have studied English for six years,         ?

---Jack, you erase the blackboard today, __________?---But I did it yesterday.

You must have missed the first train yesterday, ________ you?

 She doesn’t suppose the prices will go down this week, _______?

You must have read about Mark Twain long ago, ____?

Scientists don’t think that a warm winter always has a negative influence on our life,____?

Black doesn’t believe his son is able to design a digital camera,_____?

Ｉdon’t think Linda could have done such a stupid thing last night，_________?

You must have missed the first train yesterday, ________ you?

Many of your classmates dislike having to stay up late doing their lessons, _____? 

It’s impossible that you achieve your goal without effort, ________?

 Let’s visit the National Museum this weekend, _______? 

—The spacecraft has never been to the moon, ________ ? —Certainly.

She thinks the naughty students have escaped being punished by their teacher, __________?

I’m sure you’d rather she went to school by bus,_______?