英语 高二 词汇题 简单 ★ 精品

现在完成时与现在完成进行时 — 英语词汇题

译林版·英语(高中) Unit 1 Nature in the balance AI 三重审校通过

题目
Complete the sentences with the present perfect or present perfect continuous form of the verbs in brackets. The volunteers ______ (plant) trees for two hours, and they are still working. They ______ (plant) 20 trees so far.