Is there any possible way to help them get rid of such a bad habit?--- To tell the truth, it’s very hard. But we   on this problem trying to improve the situation.

Every few years, the coal workers ___________ their lungs X-rayed to ensure their health.

Although the peak travel time for Chinese railway doesn't start until Jan 19 this year, people who're eager to get a seat on the train _______ already _______ their struggles.

The mother         many things to get her daughter a good education.

I wonder why Jenny ________ us recently. We should have heard from her by now.