Don’t touch anything in the lab unless____.A. to be allowed B. allowed C, to be allowing D.allowed to
Many strange new means of transport have been developed in our century, the strangest of _______ being perhaps the hovercraft(气垫船).
The company used 50 percent of the raw materials, the rest of which __________ sent to other cities to help the factories there.
--- Do you really think I can achieve my goal ? --- Absolutely .___ you give up halfway .
In our childhood, we were often_____ by Grandma to pay attention to our table manners.
___ in the fascinating book , he did not notice a thief enter his room.