单项选择题

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A.Its variety of colors.
B.The way it is sold.
C.Its unusual texture.
D.Its main ingredient.
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单项选择题
A.To ask Jack to finish the lab test.B.To ask Jack for help.C.To ask the speaker to help her.D.To ask Jack to come earlier.
A.To ask Jack to finish the lab test.
B.To ask Jack for help.
C.To ask the speaker to help her.
D.To ask Jack to come earlier.
单项选择题
What is this article about
A.Energy from the sun.
B.How oil is made.
C.Natural gas.
D.Saving energy.
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