In the final exam of last term, our maths teacher Mr.Wu gave us ________we all couldn’t work out

What took you so long— I got lost. I have no of direction.

There is no doubt _____ he will finish thetask in time.

Playing on a frozen sports field sounds like a lot of fun Isn’t it rather risky, ____?

Can I have a look at other jewels before I make adecision— Certainly ________，Madam