________ is known to us a11 is that the Diaoyu islands have been part of our Chinese territory since ancient times.

After three hours’ climbing , they reached       they thought was the place they’d been dreaming of .

With the nuclear crisis worsening in Iran, the world’s attention is fixed again on ________is called the Middle East.

If I _____ you, I _____ late for school this morning.

When you ______ at a restaurant, please order just enough food.