99. A 100% ______ dress can keep people refreshed in summer and warm in winter.
The traffic problems we are looking forward to seeing ________ should have attracted the government's attention.
Jim was about to stand up when he saw something ________ near his feet. It's a snake!
David threatened ________ his neighbour to the police if the damages were not paid.
—Robert is indeed a wise man.—Oh, yes. How I regretted ________ his advice.
After Queen Elizabeth officially opened the 2012 Summer Olympics, London became the first city ________ three Olympic Games in history.