In order to keep the balance of ecosystem, every possible means _______to deal with the problems of the over-exploiting of natural resources

When can I come for the photos？I need them tomorrow afternoon. —They _____ be ready by 12p. m.

_______carefully you write, _______mistakes you’ll make.

The organizers promise _________ wins the first prizea chance to go abroad

Since then the population of London________by almost 50,000 a year—an increase largely fuelled by immigration