Why don't you bring______ to his attention that you are too busy to do it?
A. this
B. what
C. that
D. it
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Perseverance is a kind of quality---- and that's _____ it takes to do anythign well.
A. what
B. that
C. which
D. why
The shopkeeper did not want to sell for ______ he thought was not enough.
A. where
B. how
C. what
D. which
The fact has worried many scientists ______ the earth is becoming warmer and warmer these years.
A. what
B. which
C. that
D. though
调查报告的结尾部分可以写什么内容？
A. 总结全文，深化主题
B. 提出问题，启发思考
C. 表示决心，展望未来
D. 指明方向，提出建议
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