[单项选择]A remarkable variety of insects live in this planet. More species of insects exist than all other animal species together. Insects have survived on earth for more than 300 million years, and may possess the ability to survive for millions more.
Insects can be found almost everywhere—on the highest mountains and on the bottom of rushing streams, in the cold South Pole and in bubbling hot springs. They dig through the ground, jump and sing in the trees, and run and dance in the air. They come in many different colors and various shapes. Insects are extremely useful to humans, pollinating (授粉) our crops as well as flowers in meadows, forests, deserts and other areas. But ticks and some insects, such as mosquitoes and fleas, can transmit disease.
There are many reasons why insects are so successful at surviving. Their amazing ability to adapt permits them to live in extreme ranges of temperatures and environments. The one place they have not yet been found to any major e

[单项选择]A remarkable variety of insects live in this planet. More species of insects exist than all other animal species together. Insects have survived on earth for more than 300 million years, and may possess the ability to survive for millions more.
Insects can be found almost everywhere—on the highest mountains and on the bottom of rushing streams, in the cold South Pole and in bubbling hot springs. They dig through the ground, jump and sing in the trees, and run and dance in the air. They come in many different colors and various shapes. Insects are extremely useful to humans, pollinating (授粉) our crops as well as flowers in meadows, forests, deserts and other areas. But ticks and some insects, such as mosquitoes and fleas, can transmit disease.
There are many reasons why insects are so successful at surviving. Their amazing ability to adapt permits them to live in extreme ranges of temperatures and environments. The one place they have not yet been found to any major e

[单项选择]Bees are insects. They live all over the world except where it is very cold . Bees do not like ice and snow. They are the only insects that make food that you and I can eat. We eat their honey and also use their wax for making things.
Bees live in a hive. They live in hundreds of little rooms made of wax. It is in these rooms that the queen bee lays her eggs. As each egg hatches out it becomes a larva. This larva lives in a room and is fed by other bees. Every bee does a job without being told. Some make wax, others fan the hive to keep it cool. Then there are the bees that fetch nectar from the flowers. The nectar is turned into honey inside the bee that puts it into room as food for the larva or gives it to another bee. The queen bee is larger than the other bees. There is only one queen in a hive. If other queens are born, they are killed. While she keeps laying eggs, she is looked after by the worker bees.
Bees are insects, which you can find all over the world.
A. Right

[单项选择]A. The plane is full. B. The plane is late.
C. The plane has broken down. D. The flight is canceled.

[单项选择]How far do the insects spread northward
A. To Michigan.
B. To China.
C. To Maryland.
D. To Canada.

[单项选择]What plants do many insects tend to attack


A. Quiet plants.
B. Well-watered plants.
C. Healthy plants.
D. Thirsty plants.

[单项选择]Passage Four
Termites are social insects like ants, living in well-organized colonies established and centered around a queen and her mate. The queen’s chief function is to lay eggs. Termites of a worker caste, white in color, tend the eggs and young and go forth to find food. Other termites form a soldier caste; they are white also but have larger heads than the workers. In the spring, young queen and king termites-brown or black in color--fly from the nest and enter the ground to mate and start new colonies.
The colonies are underground because the soil provides moisture the termites need to sustain life. A worker dining on a tasty door frame, for example, may make several trips below ground daily, both to bring food to the colony and to replenish its own moisture supply. If its retreat to earth is cut off, it will die. In brief, termites only go into wooden structures to eat. They can’t move in and set up housekeeping there unless they find a supply of wat
A. build tunnels
B. lay eggs
C. find food
D. protect the colony