.It is uncertain whether the medicine will work on the this cold, _________?A. won't it B. isn't it C, will it D. is it
-----Excuse me. Is this the right way to the Summer Palace? -----Sorry, I am not sure. But it _______ be.
_______ you’ve got such a good chance, you might as well make full use of it.
----- ________ for the fire! ----- It's OK. I’ll be careful enough.
There is some doubt whether he will______ at the meeting.
The reason______ he was late for work was______ he didn’t get up early.