"It would have been bad manners to make his guests feel foolish or uncomfortable" "Bad manners " means ________

It advises artists to ________ from smoking or eating while painting, to use face masks and to provide adequate ventilation (通风) by means of an extractor fan

If the product does absorb moisture or ________ water, discard it

Either he or I ______to the airport.

：不管外界对大学英语四、六级考试有怎样的非议，每年的四、六级考试还是_________地进行着，不少高校的学位证书仍然与大学英语四、六级考试挂钩着，大学英语四、六级考试成绩依然神气着……当大学英语四、六级考试_________成只为一纸证书考试时，大学英语四、六级考试就已经变得_________了。 填入画横线部分最恰当的一项是（ ）。

不管外界对大学英语四、六级考试有怎样的非议，每年的四、六级考试还是________地进行着，不少高校的学位证书仍然与大学英语四、六级考试挂钩着，大学英语四、六级考试成绩依然神气着……当大学英语四、六级考试________成只为一纸证书考试时，大学英语四、六级考试就已经变得________了。填入划横线部分最恰当的一项是（ ）。

Duty is an act or a course of action that people __________you to take by social customs, law or religion.

It is generally considered unwise to give a child___( )_____ he or she wants.

—Hurry up, or we’ll be late.—Take your time. it’s just ______ short distance from here to ______ cinema.

—How long does it take us to go to your hometown from here?—It takes us ______ hour or more to go to my hometown by ______ train.

Many artists find it hard to___________a living from art alone.

By saying “While it’s true that ..., be they scientific or artistic” (Lines 1-3, Para.5), the author means that _____.