It’s dangerous to walk across the street carelessly.—You’re right. We can’t be ________ careful while crossing the street.

Make sure to turn off the gas after you take a bath, which would ___ cause danger

Bread ______ butter? — Bread ______no butterthank you

It was not until midnight theyreached the camp site.

China’s icebreaker Xuelong ______ by heavy floes since Friday after rescuing passengers on a Russian vessel stranded in Antarctica.