It is customary to ______ ones resignation one month before ones last day.A．turn downB．tur

To tip a barman or barmaid, it is customary to tell him to __________.A.“Keep this to yo

—What time is the next flight to Washington？ —_______A.It’s a smaller one.B.It’s too la

To say something _______ one thing, to do it _____ another.A、is; isB、are; areC、is; areD

One of the problems with multiple authorship is that it is hard ______A．to allocate the re

One good way to master the ideas of an article is to make a（n)______ of it.A．abstractB．dig

It is ______ to motivate employees in a growing organization than a declining one.A．more e