I'll trade you my stamp collection _______your model boat.
At the computer operation test, one is supposed to stay at his own machine, keep his eyes on his screen, ______ to anyone.
______ as the “First Lady of Speech”, Dr Lillian Glass is recognized as one of the world’s leading experts on communication skills.
It rained nonstop for ten days , completely our holiday.
—What happened to you on your way back to the hotel last night ?—I lost my way in complete darkness and , things worse , it began to pour .
Creating better health care, education and housing for everyone is a simple idea, but ____ which is hard to put into practice.