The old woman ______ her sons and daughters ______ andsee her from time to time.

Sometimes we will never know the true value of a moment it becomes a memory.

He gave away the company’s commercial secret to another competitor,which means_________. [ ]

I can’t forget the time _______ the earthquakehappened in Yushu.

Pro. Smith will give us a report to ______ the world present economic problems.