题目内容

【题目】Rick has learned a lot about Chinese culture________he came to China.

A.before

B.when

C.until

D.since

【答案】D

【解析】句意:自从Rick来到中国,他已经学到了很多中国文化。本题考查引导状语从句的连词的用法。before在……之前;when当……时候;until直到……为止;since自从。由从句用一般过去时,主句用现在完成时可知设空处用since引导时间状语从句,故选D项。

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相关题目

【题目】阅读下面短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项。
How much do you know about the bird world?
Birds use three gaits: walking, running and hopping.
In walking, the left and the right feet move in turn (轮流).Each foot is on the ground for more than half the time, so there are more times when both feet are on the ground.In running, each foot is on the ground for less than half the time, and there are more times when both feet are off the ground.In hopping, the feet move almost at the same time.This means that for much of the time both feet are off the ground.
Middle-sized and large birds walk at low speed and either run or hop at higher speed.Small birds, such as sparrows and swallows, usually do not walk, because walking may be too slow for them.It seems that the more time a bird spends in trees, the more likely it is to hop.Perhaps there is wide space in a tree between one thin branch (树枝) and the next, so walking is not a good choice, while on each small branch there is enough room to set both feet down side by side, so hopping seems to make sense.
(1)How is the bird moving when both feet are on the ground for more than half the time?
A.By flying.
B.By running.
C.By walking.
D.By hopping.
(2)Which of the following shows a bird is hopping?
A.
B.
C.
D.
(3)Why do the birds in trees usually move by hopping?
A.Space between the two branches is wide.
B.The birds in trees are small in size.
C.There is little room to set the birds' feet on.
D.Branches are high in the air off the ground.
(4)Which of the following usually moves by hopping?
A.A duck.
B.A chicken.
C.A snake.
D.A sparrow.
(5)What does the underlined word "gaits" mean?
A.Directions of flying.
B.Speeds of moving.
C.Ways of moving.
D.Times of staying in trees.

【题目】阅读理解 阅读下列短文,选出最佳答案。
C

A science fiction flying car looks like a normal car, but it is an aircraft (飞行器) that anybody can fly directly from any place to another without using roads or runways. Science fiction writers have written about flying cars for a long time. But now flying cars will soon fly out of the world of science fiction into our real world. And the dream of the science fiction writers will soon come true.
The first-known sky car is the FSC-1. The FSC-1 looks like an expensive sports car. You can drive the FSC-1 on the road like a normal car. If you touch a button, its wings and propeller (螺旋桨) fold out and then it can take off, fly and land as an airplane. The owners of the FSC-1 can choose if they want to drive or fly.
Another flying car or sky car is the Moller Skycar M400. Although you can't drive it on the roads, it is small and easy to fly and can take off and land like a helicopter (直升飞机). Urban Aeronautics’ X-Hawk is another type of sky car. It is expected to be available for about $3 million.
Just like any new technology, flying cars have taken a long time to be developed. But some experts think the technology is far from what people imagine when they are sitting in traffic. It still needs to be improved.
(1) kinds of flying cars are mentioned in the passage.
A.Two
B.Three
C.Four
D.Five
(2)The writer thinks that flying cars will be no longer a dream because .
A.science fiction writers’ ideas are stupid
B.they are too expensive to make
C.they will soon be available
D.they are only in science fiction
(3)The FSC-1 can .
A.change itself into a robot
B.move on water like a ship
C.be flown only like an airplane
D.be driven like a car and flown like an airplane
(4)The Moller Skycar is different from the FSC-1 because .
A.it can't fly
B.it can't be driven like a car
C.it is difficult to land
D.it is much more expensive
(5)Some experts think the technology of flying cars is .
A.normal
B.traditional
C.not good enough
D.strange

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