To stay safe in the forest at night, we should try hard to keep the fire _______.
Since when has ____ been any of your business what I do?
We walked as fast as we could,____ to catch the 9:30 train.
—See the gathering clouds outside? Please take this umbrella with you. — .
Scientists hope to____soon in their fight against heart disease.
We haven’t heard from her for long, so we give her_____for dead.