It is important to have your eyes examined regularly to check for any sign of eye disease that may not have any ________.
| A．symptom |
| B．similarity |
| C．sample |
| D．shadow |
People develop ______ preference for a particular style of learning at ______ early age and these preferences affect learning.
| A．a; an | B．a; 不填 | C．不填; the | D．the; an |
It took him a long time to ______ the skills needed to become a professional artist.
| A．acquire | B．inquire | C．Require | D．request |
We should take care of the blind. It is immoral to _______ them.
| A．make room for | B．make fun of | C．make up for | D．make use of |
Look out! Don’t get close to the building. It _________.
| A．was rebuilt | B．has been rebuilt | C．is being rebuilt | D．had been rebuilt |
If you _______ spit at all. pleasespitin the bucket provided.
| A．shall | B．must | C．should | D．may |