Twenty years (19) _________, Earth Day went global, mobilizing 200 million people in 141 countries and lifting environmental issues onto the world stage

More (16) _______ 1 billion people now participate in Earth Day 

Rewrite second sentences with the same meaning.

"How often do you visit your grandparents?" Lan asked Mai.

=> Lan asked Mai ____________________________________________________________.

Rewrite second sentences with the same meaning.

They were calling for help when the rescue workers appeared.

=> While ___________________________________________________________________.

Rewrite second sentences with the same meaning.

These are her books.

=> These books ______________________________________________________________.

 Find the mistake in each of the following sentences and circle A, B or C.

 Despite he was tired, he still went to school.

Rewrite second sentences with the same meaning.

I will give him your letter when I see him tomorrow.

=> As soon as _______________________________________________________________.