_____ underground for 2 years, David says the worst thing is not the danger but the darkness.
A. Working B. Having worked
C. To have worked D. Worked
She ____ have left school, for her bike is still here.
A. can’t B. mustn’t C. needn’t 
D. shouldn’t
According to our school rules, no student ____ be permitted to carry mobile phones in class.
A. will B. must C. may D. shall
You have no idea what I have had to _____ during the last few months.
A. put through B. go through
C. read through D. look through
The woman told the workers that her house _____.
A. required to paint B. required painting
C. requires paint D. requires being painted
The school requested that all the students ____ school uniform on weekdays in school.
A. wear B. wore C. wears D. have worn
