—Why was Professor Johnson unhappy those days? —Can't you see it clearly? The only reason was that the theory he stuck to_____ wrong.
According to the school rules, no student __________ go out of the school after eleven o’clock at night without the teacher’s permission.
Going on a trip into space must be quiteexciting experience.
After the school sports, our headmaster ______ the prizes.
________ to sunlight for too much time will do harm to one’s skin.
I’m very happy _________ a chance to visit your country.