The poster says that a writer and poet ___ to give us a talk on English next week.

The number of people invited ____ fifty, but a number of them ____ absent for different reasons.

The country’s population ______ small, and most of its population ______ in the mountainous areas．

No worker and no engineer           who it is that is           for the explosion of the chemical factory.

The light ____  red. You ____  cross the road.