We saw a snake and ___________ parents for help a moment ago.
| A．shout to | B．shout at |
| C．shouted to | D．shouted at |
What the forest of the USA in the last 350 years?
| A．has happened to | B．is happened to |
| C．has happened at | D．is happening |
In order to eat safely, I think we make some food by ourselves instead of buying some．
| A．used to | B．prefer to |
| C．had better | D．are supposed to |
After hard training for a long time, Liu Xiang the records again．
| A．broke | B．achieved |
| C．invented | D．completed |
If all business goes paperless, at least one million tons of paper will be a year．
| A．used | B．saved |
| C．copied | D．offered |
—Dear, what time is the flight to Beijing on Saturday?
—Wait a minute．Let me _______ in the schedule (时刻表)．
| A．look at it | B．look for it |
| C．look after it | D．look it up |