Would you please tell me_______ to do with all the problems, Mr. Chen — No problem.

Never before _____in greater need of modernpublic transport than it is today

All the people in the nation can rememberexactly how many years ago _______ the civil war broke out.

If you are not satisfied with our work, you can complain to the manager who is _________ customer service.

There is ________ boy in the corner.