You will find ______ useful to learn even a little English.

Why don’t you have a notebook with you? —I’ve_________it at home.

On the way _____ the mountain village, we found the local houses different from ours.[ ]

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

What cold weather it is!–The radio says it will be even ________ tomorrow. Remember to put on more clothes.