Rewrite the following sentences so that the second sentence means the same as the first one.

1Scientists have invented new devices to helo people live a longer life new devices
2 i don 't have enough time ,so i can 't go on holiday this summer 

If

3 the man had broken leg. He tried to save his wife.

In spie fo

4 I can 't tell you because I don 't know the answer 

if 

5 they will do the test well review them all hard 

if 

6. The rescue workers evacuated the villagers in the raged flood to the safe place last night 

the villagers in the raged flood 

7 the students will provide aids for the homeless people tomorrow 

aids

8 the people will protect environmental now . The environment will be nice 

if 

9 they don't have a map, so they get lost 

if

10 the storm destroyed many houses in this village last week 

Many houses