Question

【题目】We must keep the classroom because we’re going to have an English party tomorrow.

A. cleanB. to cleanC. cleaningD. cleaned

Answer 1

【答案】A

【解析】

句意：我们必须保持教室干净，因为我们明天要开英语晚会。

根据keep sth+形容词 保持某物处于某种状态，clean干净的（形容词），to clean不定式，cleaning动名词，cleaned过去分词；故选A。