题目内容
We make a box for_______ birthday.?
A. Jim B. Jims C. Jim's
C
【解析】本题主要考查名词所有格，表示“某人的生日”需名词所有格。故选C
Have you ever heard an echo of your voice?
An echo is a reflected(反射)sound. Stand in a very large, empty hall with nothing on the walls. Then shout. The sounds you make will hit the walls and come back to you. The walls reflect the sounds. These reflected sounds are called “echoes”.
We can use reflected sound to make sound travel farther. Hold a watch about fifty centimeters from your ear. You cannot hear it. The sound of the watch travels a short way in all directions. It does not travel as far as your ear. You can make it travel to your ear by using a roll of cardboard(纸板筒).
Make the roll of cardboard about fifty centimeters long. Put one end over your ear and hold the watch at the other. Now you can hear the watch because the sound has not gone in all directions. It is reflected down the roll to your ear.
A megaphone(喇叭筒)works in the same way. It makes sound travel farther. It reflects the sound into a beam which can travel a long way. In the ship, the sailor uses the megaphone to make his voice travel. Without the megaphone, his voice cannot travel far.
We use reflected sound in many ways. We use it to measure the depth of the sea, for example. Among the animals, bats and whales use reflected sound to tell them where they are and what things are near them.
【小题1】What is called “echo”?
| A．Very loud voices. |
| B．Very loud voices that are made by man. |
| C．Very loud voices that are made by animals. |
| D．The sound that is made by man or animals comes back from some place. |
| A．shout in a small room |
| B．shout in a large house full of things |
| C．shout in narrow valleys(山谷) |
| D．shout in the open air |
a. We hear the reflected sound
b. The sound returns to us
c. The sound hits the walls
d. We make a sound
| A．c, b, a, d | B．c, a, b, d | C．d, c, b, a | D．d, b, c, a |
| A．reflected sound is useful only to blind people |
| B．people haven’t made use of reflected sound yet |
| C．bats use reflected sound to fly and get food |
| D．whales don’t use reflected sound as they live in the sea |
| A．a long piece of wood | B．a roll of cardboard |
| C．a thin thread | D．a long piece of silk |
If we find a bird nest (巢), we will have a good place of watching and knowing about birds. Birds sit on eggs and take care of their babies from April to June. Because the baby birds are too young to leave the nest, parents often go to look for food and come back in several minutes. So it is good to watch birds. When we watch birds, we'd better hide ourselves in a close place to the nest, and it's better to use binoculars (双筒望远镜).
But how do we make a bird nest? A good bird nest must be very fine, strong, thick and comfortable. If you want to make one, please follow these:
a) Each nest must have six boards (木板) for its cover and floor, for its left and right sides, and for its front and back sides. Don't make the boards too slippery (滑的).
b) Dig a small hole in the front of the nest as a "door". The "door" is big enough so birds can fly in or out easily.
c) Make sure the rainwater can't go into the nest.
d) One piece of the board should be easy to open.
e) Don't forget to colour the nest.
【小题1】We need ______ near a bird nest if we want to watch and know about birds.
| A．a good place | B．some trees | C．to sit on eggs | D．to make a bird net |
| A．look after the birds more often | B．use the binoculars to catch the birds |
| C．hide ourselves to make the birds do everything as usual | D．catch the birds at last |
| A．we can clean the nest | B．birds can fly in or out |
| C．we can hang it | D．we can make it |
h
year he took his corn to the market. Then each time his corn was chosen as the and
won the first prize.
,
cross-pollination (异花传粉) will affect the quality of my corn. So if
I want to grow good corn, f must my
neighbors to grow good corn. "补全对话。从方框中选出适当的句子补全对话。
A: Lucy, why are you going out 1 ?
B: That’s the sound of a truck collecting rubbish.
A: Do you mean you have to take the rubbish to the truck?
B: Yes. You know 2 is our duty. We should help protect the environment.
A: I agree. 3 , we must do something around the neighbourhood.
B: Sure. It is our duty to keep the environment clean and tidy. If we make a contribution to protecting the environment, 4
A: That’s right. We mush try our best to make our country more beautiful. So we should 5 to improve the environment.
|
A. taking care of the environment B. the world will become much more beautiful C. do something useful D. after hearing the music E. Wherever live |
Which of the following can’t we use when we make a telephone call?
|
A．Who’s that? |
B．Who’s calling? |
C．Who’s speaking? |
D．Who are you? |