[单项选择]All specialists agree that the most important consideration with diet drugs is carefully ______ the risks and benefits.
A. valuing
B. evaluating
C. estimating
D. weighing

[单项选择]Most scientists agree this outpouring contributes to global warming, which could eventually lead to coastal flooding, ______ weather, and widespread crop loss.
A. intensive
B. extreme
C. unpleased
D. unique

[单项选择]Most of all, older men and women must regain the chance to live as free human beings with dignity and respect in ______ with our democratic principles.
A. cooperation
B. connection
C. harmony
D. solidarity.

[单项选择]

Most musicians agree that the best violins were made in Cremona, Italy, about 200 years ago. These violins sound better than any others. They even sound (21) violins made today. Violin makers and scientists try to make (22) like the old Italian violins. (23) they aren’t the same, Musicians prefer the old ones. No one really knows (24) these old Italian violins are so special, (25) many people think they have an answer.
Some people think it is the age of the violins. But not all old violins sound wonderful. Only the old violins from Cremona are (26) .
Other people think that the (27) to those violins is the wood. The wood of the violin is very important. It must be from certain kinds of trees. It (28) too young or too old. Perhaps the violin makers of Cremona knew (29) special about wood for violins.
But the kind of wood may not be (30) important. (31) may be more important t
A. Here
B. They
C. It
D. That