. — Are you sure the 2010 Shanghai World Expo will be a great success?— Yes, __________! It’ll be wonderful!

Trees are good for human being. We can’t plant them __________ many.

—Could you tell Lucy about the news when you see her?—Sure, I will ________ I see her. 

A new study of HIV-infected people in Haiti indicates that starｔing treatment early could save many patients who might _______ die of AIDS.

“If you’re walking down the right path and you’re willing to keep walking,_____ you’ll make progress”, said the president Obama.