题目内容：

 

1.As soon as he entered the tall building, he heard a sharp cry coming out of it.

__________ __________ the tall building, he heard a sharp cry coming out of it.

2.We insisted that the Browns should use our car, but they refused.

We __________ _________ lending the Browns our car, but they refused.

3.The average age of Senior 1 students in our school is about fifteen.

___________ ___________, the age of Senior 1 students in our school is about fifteen.

4.Students are not allowed to enter the examination room with mobile phones.

Students are ___________ ___________ entering the examination room with mobile phones.

5.I’ve been doing exercise regularly for a long time, but I’m still the same weight.

I’ve been ___________ ___________ regularly for a long time, but I’m still the same weight.