What makes online shopping so popular is it shortens the distance between manufacturers and consumers.
| A．how | B．that |
| C．whether | D．why |
______the Internet is of great help, I don’t think it’s a food idea to spend too much time on it.
| A．If | B．While | C．Because | D．As |
The growing speed of a plant is influenced by a number of factors, are beyond our control.
| A．most of them | B．most of which | C．most of what | D．most of that |
The president was so absorbed in his work that not a sound ______.
| A．did she dare to make | B．dared she to make |
| C．she dared make | D．she did dare to make |
____of danger in the street at night, she had to go home, with a friend ___ her.
| A．Warned; accompanied | B．Warning; accompanying |
| C．Having warned; accompanied | D．Having been warned; accompanying |
the website of the Fire Department in your city, and you will learn a lot about firefighting.
| A．Having searched | B．To search | C．Searching | D．Search |