18. It is ______ that he has passed the examination, and I am _____ I will pass it too.
The country life he was used to ______ greatly since 1992.
The number of people invited ______ fifty, but a number of them _____ absent for different reasons.
When and where to go for the on-salary holiday ______ yet.
Every possible means ______ to prevent the air pollution, but the sky is still not clear.
E-mail, as well as telephone,______ an important part in daily communication.