—We're doing a lot to protect our environment, but it is not good enough. —So we should try______ to look after it.

 — The dish is delicious! — Well, at least it’s as __________ as the one I cooked yesterday.

---- Can you walk ______ faster?  ---- Sorry, I can’t. I am too tired ______ any more. 

—What a cold day!—The weather report says it will be even        tomorrow.

— Which month has ________ days in a year?　 — February.