Question

Nature reserves are very important for preserving many animals and plants, which would _______ run the risk of becoming extinct.

A．otherwise

B．therefore

C．though

D．instead

Answer 1

A

試題分析：A否則，要不然；B因此；C然而；D代替，而不是；句意：對于保護很多野生動植物來說自然保護很重要，要不是這些動植物會有滅絕的危險。根據句意說明A項符合上下文。