In much of the animal world, night is the time ______ for sleep – pure and simple.
Agriculture _____ about 14 percent of global greenhouse gas emissions, and transporting the food around adds to the environmental cost.
Living in ever increasingly fast-paced world, we must take____ advantage of every opportunity to develop.
--- Excuse me, is the shop open around the clock? --- ________. Only from 8:00 a.m. to 4:00 p.m.
It's an either-or situation - we can buy a new car this year or we can go on holiday but we can’t do ______.
I'll go to the library as soon as I finish what I .