Curious about the world around him, my son__   __ask me endless questions when he was young．

---Mr. Wu, can I have a look at the scores?---Well, you are a senior, so I_____ hardly remind you that the scores are not open to students.

— Mum, would you please buy me an MP5 player? — If you can help do some housework the whole vacation，you _______ have one as a reward. 

This book isn’t mine. ________can it be?

 What's wrong with your car? - Well, as you know, cars usually_______ start in winter.