Everyone queued up before the booking office in silence, having nothing to do but _________.
It is thought that one billion people I the world, _____is half the word’s workers, earn their living by farming.
I think whoever makes____contributions to the company than the others should get____income.
Our teacher is always busy preparing lessons until 11 o’clock at night, _____we students have gone to sleep.
The news _____is spreading around the airport is _____a heavy storm is coming.
He is taller than he ______.