Question

【题目】My mother promises ______ me a new e-bike.

A. buyB. buysC. buyingD. to buy

Answer 1

【答案】D

【解析】

句意：我妈妈答应给我买一辆新的电动自行车。A. buy动词原形；B. buys第三人称单数形式；C. buying 动名词或现在分词；D. to buy动词不定式。根据固定短语promise to do sth.答应做某事，可知，此空故填to buy，故选D。