单项选择题

A．The animals overfertilize the soil.
B．Dead plant roots can’t hold the soil together.
C．The wrong types of plants are left standing.
D．There is a buildup of plant and animal matter.
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单项选择题
A．She’s sorry she can’t help the man.B．She didn’t earn a good grade in the biology course either.C．The man will begin to appreciate the biology course.D．The man should find a biology tutor.
A．She’s sorry she can’t help the man.
B．She didn’t earn a good grade in the biology course either.
C．The man will begin to appreciate the biology course.
D．The man should find a biology tutor.
单项选择题
A．To show how politics have changed over the years.B．To point out that T-shirts often provide personal information.C．To illustrate how the printing on clothing has improved.D．To support that T-shirts are a form of art.
A．To show how politics have changed over the years.
B．To point out that T-shirts often provide personal information.
C．To illustrate how the printing on clothing has improved.
D．To support that T-shirts are a form of art.
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