Some of you may have finished unit one．________, you can go on to unit two．
A．If you may B．If you do C If not D．If so
The conference aims to develop business and let people think about ______ they can have a positive influence on the planet.
| A．why | B．that | C．what | D．how |
The traffic rule says young children under the age of four and less than 40 pounds must be in a child safety seat.
| A．being weighed | B．to weigh | C．weighed | D．weighing |
—According to my grandma, it is a good idea to eat chicken soup when you have a cold.
—, scientists agree with her.
| A．Sooner or later | B．Once in a while | C．To be exact | D．Believe it or not |
“You have a wrong number,” she said. “There’s no one of that name here.”
| A．need | B．can | C．must | D．would |
For many years, people electric cars. However, making them has been more difficult than predicted.
| A．had dreamed of | B．have dreamed of | C．dreamed of | D．dream of |