change the verbs in brackets into the passive and complete the sentences.(1) the sahara was not always a desert millions of years ago_________(cover) in grasslands and forests. now, only a tenth of the sahara desert____________(cover)with wind-blown sand. the rest is plains and mountains.(2) many stars in the universe are bigger than our sun. the biggest star__________(estimate) to be over 700 times as big as the sun. so, these stars________(know) as blue giants.

1

Answers

2014-12-23T17:57:28+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
The sahara was not always a desert  millions of years ago.   
It was covered in grass lands and forests.    
Now, only a tenth of the Sahara desert is covered with wind-blown sand.
The rest is plains and mountains.

Many stars in the universe are bigger than our Sun.
The biggest star is estimated to be over 700 times as big as our Sun.
So, these stars are known as blue giants.

1 5 1