5. Mary________(lose) her pen. ____________ you ______________ (see) it here and there?

4. Half an hour __________ (pass) since the train __________ (leave).

3.Both of them ________________ (come) to Hongkong ten days ago.

2.Both of them ________________ (be) in Hongkong for ten days.

1.She’s _____________ (live) here ever since she was ten.

4.　　　 “你曾经到过那里吗？”　 “不，我从来没到过那里。”

III. 用适当的时态填空：

3.　　　 打那以后，她一直住在这。

2.　　　 我们已经认识有二十年了。

1.　　　 他们已经打扫了教室吗？

5.　　　 “Has the bus left _______?”　 “Yes, it has _________ left.”

II. 翻译下列句子：