[单项选择]Upon reaching school, （）.
A. many letters were found on the desk
B. I found many letters on the desk
C. there were many letters on the desk
D. there existed many letters on the desk

[单项选择]Upon reaching school,（）
A. many letters were found on the desk
B. I found many letters on the desk
C. there were many letters on the desk
D. there existed many letters on the desk

[单项选择]

The very real and far reaching implications inherent in the current changes being experienced by government spaceports, with terms of their effect upon the whole international space community, are also highlighted.（）

A. for terms of
B. as terms of
C. in terms of
D. from terms of

[单项选择]

Reaching new peaks of popularity in North America is Iceberg Water, which is harvested from icebergs off the coast of Newfoundland, Canada.   
Arthur von Wiesenberger, who carries the title Water Master, is one of the few water critics in North America. As a boy, he spent time in the larger cities of Italy, France and Switzerland, where bottled water is consumed daily. Even then, he kept a water journal, noting the brands he liked best. “My dog could tell the difference between bottled and tap water,” He says.   
But is plain tap water all that bad Not at all. In fact, New York’s municipal water for more than a century was called the champagne of tap water and until recently considered among the best in the world in terms of both taste and purity. Similarly, a magazine in England found that tap water from the Thames River tasted better than several leading brands of bottled water that were 400 times more expensive.&
A. It is a kind of iced water.
B. It is just plain tap water.
C. It is a kind of bottled water.
D. It is a kind of mineral water.

[单项选择]On reaching the top floor I suddenly realized that I _______my book on the service desk.
A. had forgotten
B. left
C. had left
D. was left

[单项选择]After coming out of the art gallery and reaching his car, the man felt, above everything else______.

[单项选择]Some of the meat smelt bad before reaching the market and ______ away.
A. could be thrown
B. must throw
C. had to be thrown
D. should throw