[单项选择]After years of research, Dr. Duke ______ new ideas on the muses of dream.
A. brought up
B. brought about
C. came up
D. came about

[单项选择]After years of research, Dr. Duke ______ new ideas on the muses of dream.
A. brought up
B. brought about
C. came up
D. came about

[单项选择]After years of research,Charles Drew devised a procedure for preserving plasma.


A. transporting
B. saving
C. reusing
D. labeling

[单项选择]After years of research, Charles Drew devised a procedure for preserving plasm
A. A． transportingB. savingC. reusingD. labeling

[单项选择]After years of research, scientists have ______the virus that is responsible for the disease.
A. recognized
B. identified
C. guaranteed
D. notified

[单项选择]After years of research, scientists have ______ the virus that is responsible for the disease.
A. recognized
B. identified
C. guaranteed
D. notified

[单项选择]New ideas sometimes have to wait for years before ______.
A. fully accepted
B. fully accepting
C. being fully accepting
D. having fully accepted

[单项选择]New ideas sometimes have to wait for years ______ they are fully accepted.
A. when
B. before
C. after
D. where

[单项选择]During these ten years, many new methods have been ______ in the field of foreign language teaching.


A. adopted
B. adapted
C. alarmed
D. aided

[单项选择]

In recent years a new farming revolution has begun, one that involves the (21) of life at a fundamental level—the gene. The study of genetics has (22) a new industry called biotechnology. As the name suggest, it (23) biology and modem technology through such techniques as genetic engineering. Some of the new biotech companies specialize in agriculture and are working feverishly to (24) seeds that give a high yield, that (25) diseases, drought and frost, and that reduce the need for (26) chemicals. If such goals could be achieved, it would be most (27) . But some have raised concerns about genetically engineered crops.
In nature, genetic diversity is created within certain (28) . A rose can be crossed with a different kind of rose, but a rose will never cross with a potato. Genetic engineering, (29) usually involves taking genes from one species and inserting them into another (30) to transfer a de
A. got along with
B. given rise to
C. come up with
D. lived up to