【简介】感谢网友“雕龙文库”参与投稿，这里小编给大家分享一些，方便大家学习。
1. Cement was seldom used in building the Middle Ages.
A. crudely
B. rarely
C. originally
D. occasionally
2. Medicine depends on other fields for basic information, particularly some of their specialized branches.
A. conventionally
B. obviously
C. especially
D. inevitably
3. We were astonished to hear that their football team had won the champion.
A. amazed
B. amounted
C. amused
D. approached
4. There is an abundant supply of cheap labor in this country.
A. a steady
B. a plentiful
C. an extra
D. a stable
5. The most crucial problem any economic system faces is how to use its scarce resources.
A. puzzling
B. difficult
C. terrifying
D. urgent
答案：BCABD
