题目内容：
根据以下材料，回答题。
请在（51）处填上最佳答案。
A．off
B．on
C．at
D．of
参考答案：
答案解析：
单选题：根据以下材料，回答题。请在（51）处填上最佳答案。A．off B．on C．at D．of
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请在（51）处填上最佳答案。
A．off
B．on
C．at
D．of
请在（51）处填上最佳答案。
A．off
B．on
C．at
D．of
Which of the following statements is meant by the writer?
Which of the following statements is meant by the writer? A．Ehleringer was succe
We can measure the effects of the interaction of whatever is
We can measure the effects of the interaction of whatever is inherited with ____
I am heartily grateful to your help.
I am heartily grateful to your help.A．helpful B．hateful C．delightful D．thankful
设置会计科目和账户是会计核算工作的起点，是会计核算的方法之一。（ ）
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Things have changed a lot since I was a child.
Things have changed a lot since I was a child.A．gradually B．suddenly C．greatly D