PART TWO LANGAGE KNOWLEDGE SECTION A

Directions: Beneath each of the following sentences are 4 choices marked A, B9 C and D. Choose the answer that best completes the sentence.

It is reported that in the next few years the earth________possibly be hit by more extreme weather like storms.

A. would     B. may       C. could    D. should

关于病因的具体所指，错误的是（）

A.包括宿主、环境和致病因素（动因）

B.包括外围的远因以及致病机制的近因

C.包括疾病的启动因素或病原体

D.包括生物、心理和社会因素

E.包括交错病因链中的直接和间接病因