[单项选择]This crop has similar qualifies to the previous one, ______ both wind-resistant and adapted to the same type of soil.
A. being
B. been
C. to be
D. having been

[单项选择]This crop has similar qualities to the previous one, ______ both wind-resistant and adapted to the same type of soil.
A. been
B. to be
C. being
D. having been

[单项选择]This plant has similar qualities to the previous one, ______ both wind resistant and adapted to the same type of soil.
A. being
B. been
C. to be
D. having been

[单项选择]Previous research has established the lupine wolf as the______of the modern canine, but when and where humans first domesticated the former into the latter remains unclear.
A. competitor
B. ally
C. scion
D. prey
E. progenitor

[简答题]GM crop

[简答题]It was found that laughter has similar effects to physical exercise.

[填空题]The ______ has nothing similar to an iPod.

[单项选择]Passage 3

What does the qualifies of voice relate to a. Pitch. b. Rhyme. c. Rap. d. Vibration.

[单项选择]A. Crop production became increasingly specialized.
B. Economic depressions cut the prices of farm products.
C. New banking laws made it easy to buy farmland.
D. America increased its agricultural imports.

[填空题]The United States produced higher crop harvests before roads took away land and pollution affected crops.

[填空题]
They are giant geometric patterns, which appear over-night in a field of crops. Many people believe that they are made by aliens. (46) . "Crop circle", as the mysterious patterns are called, became a hot phrase this month.
(47) . It’s believed to be the world’s first three-dimensional crop circle. The giant crop circle gives an impression of looking down on skyscrapers from above. (48) . Crop circles were first widely noticed in the late 1970s as many mysterious circles began appearing-in crop fields throughout the English countryside. People were intrigued by these giant patterns. They were huge (at least tens of meters in diameters) and popped up over-night. (49) .
Various scientific and pseudo-scientific explanations were put forward to explain the phenomenon. Some hold that they were left by alien spaceships. Others say that they are simply an elaborate prank. (50)