The country has _____ several wars in the past century and people there are still living a poor life.

It’s hard to finish the work in a day. You’d better ____ your friends to help you.

I toured ZhangJiajie, I was deeply impressed with its beautiful scenery

What do you think of the car, Jack— It looks so nice. Besides, it’s not too expensive.

After several days of survey, the police still didn’t know the __________ of the killer.