There are 61 million “left-behind children” in central and western China, the adults have to seek jobs in the cities.
________the young man is in great need of a computer in his work is known to his boss.
The average Facebook user in the United States has 245 friends,according to a study ______in February.
_______ on the top of the mountain is an ancient tower ______ back to two hundred years ago.
______in a new country,I was scared and feeling pretty anxious.
If I were any younger,I would do ________I am interested in.