________ basic firstaid techniques will help you respond quickly to emergencies.
As PM2.5 readings reached as high as 900 in some cities, people are more _____ to get lung cancer in such conditions.
He was such __ good speaker that he held our attention every minute of __ three-hour lecture.
How much more expensive do you think a flat in a downtown area is than ______ in a suburban area?
–Mary looks down today, what’s up? --Well, ________happened between Mary and me is none of your business.
With a large amount of work ______, the chief manager couldn’t spare time for a holiday.