As teenagers, it’s very important to know how to ask for information _______.
| A．surprisingly | B．loudly |
| C．politely | D．quietly |
He was made ______ the floor after class yesterday.
| A．to clean | B．clean | C．cleaning | D．cleans |
Great changes _____ in my hometown since 1980.
| A．have been taken place | B．took place | C．have taken place | D．were taken place |
New Standard ______ 100 issues until now.
| A．is published | B．will be published |
| C．has been published | D．has published |
The same information ______ read or ______on the website.
| A．can be; listened to | B．can be; listened |
| C．can; listen | D．can; listen to |
Now things made by machine are cheaper than those made _____.
| A．at hand | B．in hand |
| C．by hand | D．with hand |