Question

【题目】He is patient enough to spend a lot of time__________ (解释)grammar rules to us.

Answer 1

【答案】explaining

【解析】

句意：他很有耐心，花很多时间给我们解释语法规则。

考查单词拼写及非谓语动词的用法。explain解释，动词。spend花费，度过；动词。speed time (in) doing sth.花费时间做某事。故答案为explaining。