It’s easy to _____ this math problem. A. work out B. find out C. look out
—_________I borrow your lighter for a minute?—Sure, no problem. Actually, you _________keep it if you want to. I’ve given up smoking.
Each of the club members ________ready to help those who were in trouble.
We arrived at the small town too late, almost at midnight. We found there was no food ________ as all the shops were closed.
—Are you satisfied with what she has done?— Not at all. It couldn’t be ________.
We will build another new Great Green Wall________ the northern part of China.