They have given up the hope to save their
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They have given up the hope to save their friend from drowning.
A:built B: ended C:strengthen D:abandoned
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答案：D
本句意思：“他们已经放弃了拯救溺水朋友的希望。"abandon：放弃、遗弃。例如：The sailors abandoned the burning ship．海员们放弃了那艘燃烧着的船。built：建造、建设。例如：Rome is not built in a day.罗马不是一天建成的（冰冻三尺非一日之寒）。 end：结束、终止。例如：The American Civil War did not end until 1865．美国内战于1865年才结束。strengthen：增强、加强。例如：Regular exercise will strengthen your health．经常锻炼能增强你的体质。