1)times / the / many / climate / changed / of / has / the / world 2) scientists / nowadays / are / that / worried / weather / the / changed / has / and / world / is / the / getting / warmer. 3) world / the / wildfire / is / fund / a / international / organization / large 4) life / is / there / where / system / solar / our / in / planet / only / the / the / is / earth. 5) what / everything / alive / on /is/ earth /the / water / needs / the / and / sun / air. , !

1) the climate of the world has changed many times.   2) nowadays scientists are worried that the world has changed and the weather is getting warmer. 3) the world wildlife fund is a large international organization. 4) the earth is the only planet in our solar system where there is life. 5) what everything alive on the earth needs is water, air and the sun.

1. boris trains three times a week.

-   did boris train three times a week?

- had boris trained 3 times a week?

- why did boris train 3 times in a week?

- didn’t boris tell you that he trains 3 times a week?

- is boris training exactly 3 times a week?

2. this leading athlete wants to become a referee.  

-   why does this leading athlete wants to become a referee?

- why should this leading athlete wants to become a referee?

- for what purpose this leading athlete wants to become a referee?

- have you not known   that this leading athlete wants to become a referee?

- when does this leading athlete wants to become a referee?

3. a friend of mine often judges the final matches in the world football championships.  

- why does a friend of yours often judges the final matches in the world football championships?

- when a friend of yours had started judging the final matches in the world football championships?

- don’t tell me that a friend of yours often judges the final matches in the world football championships?

- why would a friend of yours often judges the final matches in the world football championships?

- what is the chance that a friend of yours often judges the final matches in the world football championships?

4. ann specializes in tennis.  

- does your friend ann specializes in tennis?

- how often ann specializes in tennis?

- did you know that ann specializes in tennis?

- why would ann specializes in tennis?

- till what time ann specializes in tennis?

5. one of our students is awarded the title of merited master of sports.

- who is the one of our students that is awarded the title of merited master of sports?

- you did not know that   one of our students is awarded the title of merited master of sports had you?

- why one of our students is awarded the title of merited master of sports?

- when had one of our students got awarded the title of merited master of sports?

- why would one of our students get awarded the title of merited master of sports?

был рад )