.It is uncertain whether the medicine will work on the this cold,________?A, is it B. isn't it C, will it D. won't it
—What do you expect Mr. Zhang to succeed in? —________.
I'd like to write the letter with a ballpen. Could you please find________for me?
—Can I speak to Mr. Wang, please? —________
No matter what you say, I shall________my opinion.
The Panama Canal________the Atlantic________the Pacific.