Various _____ of electric fans are now on display in the shop windows.
| A．boxes | B．sizes |
| C．standards | D．brands |
In our class there are 46 students, _________ half wear glasses.
| A．in them | B．of them |
| C．in whom | D．of whom |
For all these years I have been working for others. I’m hoping I’ll _________ my own business some day.
| A．turn up | B．fix up |
| C．set up | D．make up |
Some of you may have finished Unit one. _________, you can go on with Unit two.
| A．If you may | B．If so |
| C．If not | D．If you do |
At the end of the eighteenth century, masks _________ completely.
| A．ban | B．had banned |
| C．banned | D．were banned |
We live in an age _________ more information is available with greater ease than ever before.
| A．why | B．on which |
| C．to whom | D．when |