There are ________ people in the supermarket. It’s so crowded.

What’s the low-carbon(碳) life style like?—-Save energy, produce carbon.

I’m _____ frightened _______I can’t say anything.[ ]

There is no _______ that drinking milk before going to bed is helpful to our health.

Excuse me, are these ______ new shoes?—No, they aren’t. ______ are black over there.