---You may find the key to the maths problem on page 107 . ---Ah, it’s so simple . I wonder why I of that .
It was the third time that the boy _________ late. So his teacher got very angry.
The two military exercises were similar __________ they were both intended to give a threat to a certain country.
_________ everyone can hear the speaker, there is no _________ in turning up the radio.
Many friends sent me e-mails to _________ me on the birth of my son.
The boy the teachers considered _________ was caught __________ in the exam, which surprised us very much.