We can conclude that________. 查看材料A.the situation w

A crater lake is at the tip of a________. 查看材料

A.mountain

B.ridge

C.island

D.volcano

根据下面内容，回答题：

A group of scientists rowing toward the center of a lake saw something shocking. They turned back as fast as they could. What had they seen? The lake was boiling!

The group was investigating a crater lake in the mountains of St. Vincent. A crater lake is the mouth of a volcano that has been dormant for some time and has filled with water.

This particular crater was the tip of a volcano called Soufriere， which erupted last in 1902. Since that time， it had not shown any signs of action. But in the fall of 1971， mountain climbers who had hiked near the lake returned to the lowlands with strange stories. They said the water had turned yellow and was giving off a smell like burnt eggs. A seething fog was rising from the lake"s surface.

Local scientists rushed to Soufriere to see if this might be the beginning of a new volcanic explosion. They found a huge black mass in the middle of the water. It was a great blob 1，000 feet long and 300 feet wide. Lava had pushed up through the bottom of the lake and formed a new island.

The investigators wanted to make sure that the volcano was safe， and that the lava would not overflow into the surrounding countryside， But they could never reach the island to study it， because the lava was so hot that the water around it bubbled and boiled.

This passage is about________. 查看材料

A.mountain climbing

B.a boiling lake

C.a new volcanic island

D.a mysterious blob

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Have you ever heard of a flower whose seeds are carried and spread by elephants? The rafflesia， a rare blossom， is very unusual. Found in the rain forests of Sumatra， the rafflesia is the world"s largest flower， measuring three feet in diameter!

This giant flower is a parasite——it needs another plant to live on. It lacks the structures needed to survive alone， The rafflesia has no stem or leaves. It is all flower. It attaches itself to the roots of other plants and sucks their juices. The flower"s favorite home is the root of the vine， which grows above ground.

The rafflesia seems to burst right out of the forest floor. Its blossom weighs fifteen pounds ! It has thick， spotted petals that give off a rotten smell. The center is about the size of a household bucket.

After a rain， it may hold up to twelve pints of water!

After the rafflesia dies， it becomes a pool of thick liquid in which its seeds float. Elephants wandering through the forest step into the mushy pool， and the seeds glue themselves to their feet. As the animals stomp through the forest， their sticky feet pick up twigs and leaves. The elephants try to rid themselves of the sticky mess， in the same way people try to get bubble gum off their shoes. The elephants rub their feet against the roots of the vine. In no time， seeds left on the vine grow into more monstrous flowers !

Elephants help to________. 查看材料

A.provide food for the giant flower

B.water the rafflesia with their trunks

C.carry rafflesia seeds from one place to another

D.stomp out the awful smelling petals

"Sacred" means________. 查看材料

A.dead

B.holy

C.black

D.fearful

根据下面内容，回答题：

Many superstitious people are afraid of black cats. They believe that black cats have a strange power. If a black cat crosses their path， they think they will have bad luck.

Black cats haven"t always had such a bad reputation. Long ago， the Egyptians thought that black cats were holy animals. They even worshipped them. Pasht was an Egyptian goddess who had a woman"s body and a cat"s head. Because the Egyptians had so much respect for black cats， they often buried the sacred creatures with great ceremony. Mummies of cats have often been found in ancient cemetery ruins. To keep the cats company after they died， mice were sometimes buried beside them.

Feelings about black cats have always been strong. People have thought they were either very good or very bad. The people of Europe， in the Middle Ages， believed black cats were the evil friends of witches and the Devil. Witches were said to have the power to change themselves into black cats.

People believed that you could not tell whether a black cat was just a cat， or whether it was a witch disguising herself as she plotted some evil scheme. The brain of a black cat was thought to be a main ingredient in witch"s brew.

Unlike their ancestors of the Middle Ages， Englishmen today consider black cats to be good luck charms. Fishermen"s wives often keep a black cat around so that their husbands will be protected when they are out at sea.

The Egyptian goddess Pasht had a________. 查看材料

A.woman"s head and a cat"s body

B.woman"s head and a lion"s body

C.cat"s head and a man"s body

D.woman"s body and a cat"s head

材料题请点击右侧查看材料问题 查看材料

A.away

B.out

C.up

D.over

材料题请点击右侧查看材料问题 查看材料

A.last

B.stand

C.go

D.remain

材料题请点击右侧查看材料问题 查看材料

A.hold

B.maintain

C.stay

D.keep

材料题请点击右侧查看材料问题 查看材料

A.natural

B.real

C.living

D.genuine

材料题请点击右侧查看材料问题 查看材料

A.doing

B.having

C.taking

D.making