do we suspect that this district is rich in mineral resources.

You can borrow my book, ___ you promise to give it back to me by the end of this month.

I am worried about my brother. I am not sure ___ he has arrived at the school or not.

___ the plan carefully, he rejected it.

My teacher recommended that I ___ as careful as possible when I took an exam.

Mark plays ___ violin, while his brother prefers to play ___ baseball.

He clearly remembers _____ by the window watching people outside rushing to their office.

What can you do if you've noticed some of the signs of stress mentioned in the passage?

You must have sent her off at the airport yesterday, ____ ?

This is the boy ___ has been highly praised.

Which of the following is not mentioned as a sign that your job is doing harm to your health?

The Bedouin people think most highly of one who is ______.