Match the words and expressions on the left with the explanations on the right
21. mandate a.best or most favorable
22. specialization b. something that incites,rouses or encourages a person
23. incentive c. something required as a condition for something else
24. infrastructure d. happening every alternate year
25.the insured e. restricting one's economic activities to certain particular fields
26. biennial f.a payment demanded in accordance with an insurance policy
27 contracting parties g. a person covered by an insurance policy
28. optimal h. authority given to perform a duty
29. prerequisite i. signatories of an agreement
30. claim j.large-scale public services,such as water and power supplies, road,rail and radio communications, etc. needed to support economic activity,esp. industry,trade and commerce
【正确答案】：21.h
22.e
23.b
24.j
25.g
26.d
27.i
28.a
29.c
30. f
【评分标准】 信息匹配正确得 1 分,否则不得分。
