I’m sorry, the sales manager is not ________. He is on the telephone at the moment.[ ]

The library needs ________, but it’ll have to wait until Sunday.

(安徽省马鞍山市2009届高三第一次教学质量检测)When she realized Iher，she quickly made a pose，smiling

When people move to another country, they often try to________ the customs of their native land.

Steps must be taken _________ this kind of disasterwill never happen again