If they [parents] give in, they feel regret and resentment over having been a pushover.
A、They make up their mind to be more strict.
B、They never regret that they have given in.
C、They feel upset that they haven't been kind enough.
D、They are sorry and angry that they haven't been firm enough.
【正确答案】：D
【题目解析】：原句译文：如果他们对孩子妥协了，又会因自己意志不坚定而悔很。实质含义为对孩子妥协时，他们会感到后悔。A项意为他们下定决心要更加严厉，more strict在原文没有相关信息；B项意为他们从未后悔他们（对孩子）的妥协，与原句语义不符；C项中feel upset（感到伤心）与原文不符。答案为D。
