1.It took him quite a few hours to get the doctor’s address from a(an)______ of doctors.
2.Every year a certain number of scientists and technologists are sent to the countryside to solve the problems ________ farmers.
A.in conjunction with
D.on the threshold
3.Earlier ________ campaigns in Singapore used posters, films, and advertisements in newspapers and magazines to promote considerate behavior.
4.Henry was ________ to take over the duties and responsibilities of his father from an early age in running a manufacturing factory.
5.Because the America’s population is so _______, its people possess quite different ideas concerning authority, the meaning of truth, the limits of free expression.
6.______ efforts are needed in order to finish important but unpleasant tasks.
5、（）What is the author’s attitude toward the firm in marketing their product in the Third World in the 1970s?
8.Attempts to rescue and re-evaluate them are ______ to be less rewarding than making a fresh start.
9.Physically he is unusually ______ and has not fallen prey to illness during his long confinement.
10.It is important to ______ with the rules to achieve fair play.
11.Truly, there is no such thing as a “free lunch”; every decision has its own ______ problems.
12.There is no ________ about what education should be, what it is for, either in schools or in other places.
13.This latest accident is a ________ illustration of the disaster that’s waiting to happen out there.
14.They made a realistic ________ of the difficulties with which they would be faced for the dam construction.
15.Many people who use drugs regularly find it difficult to exist in a drug-free world. They can become ______ psychologically and hooked physically.
16.Although he has lived there for years he has not yet ________ to the hot climate since he is from the northern part of the country.
17.The status of citizenship ______ the individual with three sets of rights or entitlements — civil, political and social.
18.I decided to join my friends there when I heard of the huge losses ______ upon cities with no military targets and people with no defence abilities.
19.The rent is $300, ¬¬¬________ of heating and water.
20.Practice in ______ examination conditions must not be delayed until close to the examination time.