The wreckage of something like a jet plain discovered in the heart of the desert is believed ______ a UFO and _______down for reasons still mysterious.

A．to be; have fallen

B．to have been; to have fallen

C．to be; to fall

D．having been; having fallen

 

【答案】

A

【解析】

試題解析：believe +n.+to be相信/認(rèn)為...是...;第二空是and連接的兩個(gè)并列謂語結(jié)構(gòu)，即is believe 與have fallen 是并列謂語，句意是那些像飛機(jī)碎片的東西被認(rèn)為是UFO，它落下的原因仍是個(gè)迷。故選A。

考點(diǎn)：考查固定搭配和句子分析。

點(diǎn)評(píng)：固定搭配需要考生平時(shí)記憶，句子分析需要考生具有很強(qiáng)的分析能力，要求考生平時(shí)多思考，多鍛煉。

 

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