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. [ ]

ow, the weather is not very good Is thereany possibility theflight would be put off

When did it begin to snow?-It started ________ the night.[ ]

Tom raised his hands ______ to say something, but he remained silent in the end

Shall we go to the art exhibition right now?— ____________