现在完成时的构成与用法 — 英语词汇题
题目
用所给动词的适当形式填空：1. The town ____ (change) a lot since I last saw it five years ago. 2. —Where is Mr. Green? —He ____ (go) to the library. He ____ (come) back in an hour. 3. My grandparents ____ (live) in this old house since 2000, and they ____ (move) to a new flat next month.