The diamond is considered the most famous and valuable jewel in the world. A diamond is a (31) of wealth.
Diamonds were made (32) great volcanic heat and pressure. A volcano is a mountain with a hole on the top. A volcano can be very dangerous because (33) it is active it sometimes (34) and causes great damage.
Diamonds were (35) towards the surface of the earth—millions of years ago by (36) great volcanic explosions. It is in the narrow volcanic pipes (37) diamonds are found, They are also found among the sand and stones of certain river (38) , and in a few places on the floor of the sea. For they were washed (39) the mountain sides by the rain.
Diamonds are very (40) . There are not many diamond pipes or diamond-producing rivers in the (41) . During the last century adventurers from Europe went to Brazil, because they had heard (42) there were diamonds in the River Amazon. Many of these early diamond (43) died of illness or (44) lost forever in the great forests. But some returned home (45) . They were lucky enough to (46) their lives.
The earliest known diamonds were found in India many (47) ago. The most recent and (48) discoveries have been made in eastern Russia. (49) most of the world’s diamonds now come from Congo, from Tanzania— (50) has the largest diamond mine in the world and from South Africa.

As far as manners are concerned, I suppose I have always been a supporter of women’s liberation. Over the years, out of a sense of respect, I imagine, I have refused to trouble women with outdated courtesies.
It is usually easier to follow rules of social behaviour than to depend on one’s own taste. But rules may be safely broken, of course, by those of us with the gift of natural grace. For example, when a man and woman are led to their table in a restaurant and the waiter pulls out a chair, the woman is expected to sit in the chair. That is according to Ms. Ann Clark. I have always done it the other way, according to my wife.
It came up only the other night. I followed the hostess to the table, and when she pulled the chair out I sat on it, quite naturally, since it happened to be the chair I wanted to sit in. I had the best view of the boats.
"Well," my wife said, when the hostess had gone, "you did it again."
"Did what" I asked, utterly confused.
"Took the chair."Actually, since I’d walked through the restaurant ahead of my wife, it would have been awkward, I should think, not to have taken the chair. I had got there first, after all.Also, it has always been my custom to get in a car first, and let the woman get in by herself. This is a courtesy I insist on as the stronger sex, out of love and respect. In times like these, there might be attackers hidden about. It would be unsuitable to put a woman in a car and then shut the door on her, leaving her at the mercy of some bad fellow who might be hiding in the back seat.

A. to issue a ban on the sale of drugs
B. to punish the drug addicts
C. to give them a warm and loving family
D. to teach them principles