–What’s the noise?–It’s the drill. Since the beginning of the term, the workers _______ our heating system.
—There is a lot of smoke coming out of the teaching-building there. —Really?It _________ be a fire,most probably.
—_________ he start at once or wait for a while? —Let him start at once.
—Is the man our sales-manager? —No,it _________ not be him.He never plays cards.
.How I wish every family _________ a large house with a beautiful garden.
One of the main themes of the summit was “sustainable development”,or the question _________ we can continue developing the world without damaging the environment.