【正确答案】 D

【答案解析】在下列动词后面如果紧跟另一个动词或者是助动词have，则这些动词必须以ing形式出现。不可以用不定式。Admit, appreciate, avoid, delay, deny, detest, discontinue, dislike, dispute, enjoy, escape, excuse, explain, fancy, feel like, finish, forgive, can't help, hinder, imagine, mention, mind, miss, it necessitates. pardon, postpone, practice, prevent, recall, report, resent, resist, risk, suggest, understand。