Although the experiment failed again and again,they didn't . A.lose their heart
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Although the experiment failed again and again,they didn't _________.
A.lose their heart B.lose hearts C.lose heart D.lose their hearts
试题答案
答案：C
解析：| 答案：C 解析：lose heart,意为“灰心泄气”,是固定短语,没有任何变化形式,heart不能变为复数。lose one's heart(to sb.)意为“爱上(某人)”。 |