It is a good idea to be careful in buying or purchasing magazines from salespersons who may come to your door.
A.It
B.to be
C.buying or purchasing
D.who

_________(39)
A.most
B.those
C.that
D.which

_________(40)
A.detriment
B.benifit
C.position
D.advocate

_________(41)
A.difference
B.attention
C.equalities
D.inequalities

_________(43)
A.freedom
B.independence
C.tradition
D.equality

_________(44)
A.kind
B.sort
C.range
D.type

According to the passage, a modern scientist should be more concerned about ____.
A.his basic research
B.the development of new ideas
C.his manipulation of genes
D.the consequences of his discoveries

It is implied in the passage that genetic engineering ____.
A.may do us more harm than good
B.is no longer desirable
C.is the most desirable for life
D.will change all human traits

All candidates will be treated equally, ____ of their age or back ground.
A.irrelevant
B.Discounting
C.notwithstanding
D.irrespective

He tried to limit himself to ____ 10 cigarettes a day.
A.be smoking
B.have smoked
C.smoke
D.smoking