英语 高二 填空题 较难 ★ 精品

动词-ing形式作主语和表语 — 英语填空题

人教版·英语(高中) UNIT 3 FASCINATING PARKS AI 三重审校通过

题目
用所给动词的适当形式填空(每空须用动词-ing形式):___ (keep) a safe distance from the wild reindeer in Sarek National Park is necessary, and for many visitors, watching them graze in the valley is truly ___ (excite).