For a simple question, ______ is not necessary to ask for her help.

___the population of Shandong Province—I can’t say exactly, but I know it ________ about 80 million

Mr. Smith is ________a teacher. He is also our good friend.

We hurried because of the foggy weather.

___________ the Internet is bridgingthe distance between people; it may be breaking some homes or will cause otherfamily problems.