单项选择题

()human behavior may be caused by eating substances that upset the delicate chemical balance in the brain.

A. Deliberate
B. Consistent
C. Primitive
D. Abnormal

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单项选择题
His strong sense of humor was()make everyone in the room burst out laughing.

A. so as to
B. such as to
C. so that
D. such that
单项选择题
Every year, one student in our high school wins a scholarship that()one year of college.

A. improves
B. subsidizes
C. obliges
D. inflicts
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