"It’s ______ warm today, let’s go swimming." "No, I don’t ______ to do. It’s ______ cold today.
Some people argue using _______ nature to meet our own needs may spell disaster, unless we start to look around and understand how _________ clean environment benefits us all.
The chair is _______; move it, please.
Excuse me, but can you tell me what UN in your papers ________?
It took _______ building supplies to construct these energy-saving houses. It took brains, too.
I fell in love with the pretty girl ________ I saw her.