_______________will not continue if an ongoing operation is changed or deletedA、

29．__________ when you are on the bus or bike．

Which do you think is _________________important, health or wealth?

And they can ______their passports______，making leaving or “escaping” virtually impossible.

Can we ______ another worker to help Jimmy or find another solution?

Under stress, people's blood pressure goes up, _________their race or sex.

Intelligent animals change their behavior _____ the demands of the situation or environment.

：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.

Americans are geographically mobile, and many learn to developfriendships easily and quickly. Approximately one of every five　　　　　　　   1．______Americans families moves every year. People relocated because theychange jobs, to attend distant colleges, get married, have children,　　　　　　2．______and simply want a change in their lives. Perhaps　　　　　　　　　　　　　      3．______as consequence, people sometimes form and end friendships quickly.　　　　　    4．______Students who attend two or three universities for their undergraduate and　　　 5．______graduate years may change their “circle of friends” several times. Likewise,　6．______people who change their jobs, while keep one or two friends from　　　　　　    7．______the original place of employment, may also change their circle of friends.Relationships based on a common activity may fade or endwhen the activity end. Mothers may meet while dropping their children　　　　   8．______off at nursery school and remain friends as their kids go to different　　　　  9．______schools. The same hold true for neighbors who are closest of　　　　　　　　　 10．______friends until one moves away.

Every few years, the coal workers ______ their lungs X-rayed to ensure their health.