—Why does the river smell terrible? —Because large quantities of water__________.
The villagers have already known_________we’ll do is to rebuild the bridge.
Come and see me whenever________________.
The system has been designed to give students quick and easy_______ to the digital resources of the library.
Either you or one of your students _________ to attend the meeting that is due tomorrow.
___________ certain that his invertion will lead to the development of production.