Question

As many as 100 species of fish, some ____ to these waters, may have been affected by the pollution．

A．relevant

B．immune

C．unique

D．convenient

Answer 1

C

試題分析：考查單詞意思, relevant意思“有關(guān)的”， immune意思“免疫的”， unique意思“唯一的”，convenient意思“方便的”，句子意思“多達(dá)100種魚，一些與對于這些水來說是唯一的，可能被污染影響了”，所以選C
點(diǎn)評：固定詞組be unique to sth意思“對于某物是獨(dú)一無二的”， may have been done意思“對做過事情的不肯定推測” ，must have done意思“對過去的肯定推測”。