Question

【题目】I can't tell you what she said. I've promised ________ it a secret.

A. keep B. to keep C. keeping D. kept

Answer 1

【答案】B

【解析】句意：我不能告诉你她说的话，我答应了保守秘密。keep保持，保守，动词原形；to keep动词不定式；keeping动名词形式；kept是keep的过去式。这句话的谓语动词是promise，承诺，答应，常用于句型promise to do sth.答应去做某事，故应选B。