____he wants to say is____ great an effort he has made to help her out.

He doesn’t know _________ English because he hasstudied it for only ________ weeks

They don’tseem __________who ________for help.

Scientists have created the world’s smallest “snowma”, _______ about a fifth of the width of a human hair.[ ]

London Olympic Games Badminton Men’s singles final, Lin Dan won the gold medal, becoming the first____________ the championship