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
本句话的意思是：“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．海员们离弃了燃烧着的船只。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。