Such exchange students________have a good knowledge of English will not worry about their daily life in America.
Scientists are convinced the positive effect of laughter physical and mental health.
If you really have to leave during the meeting, you’d better leave ____ the back door.
Let’s learn to use the problem we are facing ________ a stepping-stone to future success.
The house still needed a lot of work, but _______the kitchen was finished.
Modern equipment and no smoking are two of the things I like ____ working here.