He met many problems------ he was going over his lessons.
| A．before | B．as soon as | C．since | D．while |
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 |
My cousin told me that he could eat three big apples _____.
| A．at time | B．at a time |
| C．some time | D．some times |
You will realize what I have done for you _____.
| A．any day | B．everyday |
| C．one day | D．a day |
As teenagers, we should study hard _____surf the Internet all day.
| A．rather than | B．instead of | C．not just | D．more than |