The children without parents ______ good care of by their teachers in this special school.

You _________ such clothes because you are still a student.

Great changes have taken place in my hometown. More and more tall buidings ________everywhere.
A. can see B. can be seen C. are seeing

His mother ____ him ____ the games.
A .is allowed , to play                    B. doesn’t allow , to play
C doesn’t allow  play                     D. is allowed  play

–Our classroom _________ twice a day. So it is very clean.
–It is important for us to do this.

--Are you often          on vacation?   -- Not always.

--- How beautiful your school is！
-- Yeah, it      to be one of the most beautiful schools in our city.

—Oh, this is really an old building.
—Do you know when it        ?

When he was at college, he and his friends          to organize a party.

The light bulb ______ by Edison in the middle of the 1780s.