[单项选择]_______is known to all, the earth moves around the sun once a year.
A. That
B. As
C. What
D. It

[单项选择]________ is known to us all, the earth moves around the sun.
A. Because
B. For
C. So
D. As

[填空题]As is known to us all, Hainan is the second (large)（）island in our country.

[单项选择]With energy prices around the world hitting all-time highs, more and more consumers are welcoming the advent of the electric car. They believe that using the electric car will soon become a trend.
However, many other people doubt the practicality or efficiency of the electric car. They keep pointing out that it has to be recharged regularly. Besides, it is not as good looking as ordinary cars. And, above all, it still causes pollution.
Despite such criticism, fans of the electric car believe that all these problems can be solved. They insist that, with more investment and technology involved, all aspects of the electric car can be greatly improved.
Optimists predict that within 20 years there will be more electric than gas-powered cars on the roads. If so, we can look forward to consuming less of the world’s oil supply while still enjoying the freedom and convenience of driving.

To: George Smith
From: G
A. They will draw more criticism.
B. Investors get rich quickly.
C. The cars can be greatly improved.
D. The technology becomes more difficult.

[单项选择]Venus (金星) is known as the earth’s "twin" because the two planets are so like each other in size. The diameter of Venus is about 7, 520 miles (12,100 km. ), smaller than that of the earth. No other planet comes closer to the earth than Venus. At its nearest approach it is about 25,000,000 miles (40,2000,000 km. ) away.
As seen from the earth, Venus is the first planet or star that can be seen in the western sky in the evening. At other times, it is the last planet or star that can be seen in the eastern sky in the morning. When Venus is near its brightest point, it can be seen in daylight. Early astronomers called the object that appeared in the evening Hesperus, and Phosphorus in the morning. Later, they realized these two objects were the same planet. They named it Venus in honor of the Roman goddess of love and beauty.
Travelling around Venus in a straight way, you would have a long trip of about ______ miles.
A. 24,896
B. 23,613
C. 37,994
D. 25,000,000

[单项选择]Canada is well known for all the following EXCEPT
A. its mineral resources．
B. its forest resources．
C. its fertile and arable land．
D. its heavy industries．