单项选择题

In the first decades of this century, the individual gene could be worked with fruitfully.

A. blindly
B. completely
C. productively
D. carefully
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The girl felt extremely awkward and uneasy when she could answer the teacher's question.
A. difficult
B. stupid
C. relaxed
D. worried
单项选择题
My brother' s plans are very ambitious.
A. arbitrary
B. aggressive
C. adequate
D. abundant
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