The brain is capable of ignoring pain messages if ______ to concentrate on other activities.
A: it allowed
B: is it allowed
C: allowed
D: allowed it
A: it allowed
B: is it allowed
C: allowed
D: allowed it
举一反三
- It is decided that no smoking ______ in public places from now on. A: be allowed B: is allowed C: will be allowed D: has been allowed
- Three days_____ for them to make the necessary preparations for the ceremony. A: have allowed B: had allowed C: were allowed D: allowed
- Our English teacher , as well as all the students,______ not ______ Chinese in the English corner. A: is ; allowed to speak B: is ; allowed speaking C: are ; allowed to speak D: are ; allowed speaking
- We _____ to go into the school unless we are in school uniforms. A: allow B: are allowed C: are not allowed D: should be allowed
- The fact is that citizens ____ enter this palace without special permits. A: is allow not B: are not allowed C: were not allowed D: are not allowed to