Due to bad weather，the police had to __________the search for the missing boy.
A．resignB．a(chǎn)bandonC．conductD．release
B

試題分析：考查動(dòng)詞辨析。句意：于天氣惡劣，警方不得不放棄尋找那失蹤的孩子。resign“辭職”；abandon放棄；conduct指導(dǎo)；release釋放。根據(jù)此題干中的時(shí)間狀語(yǔ)so far(迄今為止)可知應(yīng)用現(xiàn)在完成時(shí)。故D正確。
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