It is estimated that there are about 800,000 people called Smith in______.A．England and Sc

It is ____ that the two families are asked if there are any objections right during the ceremony.

There are many things whose misuse is dangerous, but it is hard to think of anything that

There are many superstitions in Britain, but one of the most 【B1】 held is that it is unluc

Why is it so difficult to fall asleep when you are overtired？ There is no one answer that【

It is the firm belief of astronomers that there are living creatures on other planets. It

It is estimated that some seven hundred million people about half the world’s adult population are