1 . Three women and their children __________(rescue) from the burning house by the firemen since the fire broke out. (所给词的适当形式填空)

2 . A large amount of water ________ (save) by this system so far. （所给词的适当形式填空）

3 . Many new houses ________(build) in the past few years. (所给词的适当形式填空)

4 . His theory has been ________ (证明) by the experiment up to now. （根据汉语提示单词拼写）

5 . Despite the previous rounds of talks, no agreement_________(reach) so far by the two sides. (所给词的适当形式填空)

6 . Great changes ___ in my hometown and a lot of factories _______.

A．have been taken place , are being set up	B．have taken place , have been set up
C．are taken place , had been set up	D．had taken place , will be set up