The work of professional sectaries is so ______ that few people like to apply for it; it demands of not only high working efficiency bust also ______ available all the time. As a result, they are ______ great demand. [ ]

, Bill, I can’t go straight on and spend moretime with you in Paris.—________.

Last month, doctors used a 3-D printer to rebuild the face of a person ____ had a bad accident.

I’m hungry .Will you please give me bread –Of course.

Let’s ____volleyball.- That sounds good