Nguyen Quang Hai plays football most skillfully than his brother does.

This book isn’t as interesting as that one.

->That book ________________________________________________________

It is necessary for us to protect and keep our enviroment clean and fresh.

->We should ______________________________________________________

What ________ when your mother called you yesterday afternoon?

What did Cinderella do at the ball?

My grandfather made me the most ________ kite I have ever had. (color)

Choose the word that has the underlined part pronounced differently from that of the rest.

The black horse doesn’t run as fast as the white one. (faster)

->The white horse ____________________________________________________