单选题：You should not touch it if you are not sure it is secure eno

题目内容：

You should not touch it if you are not sure it is secure enough. A．clean
B．pretty
C．distant
D．safe

参考答案：

答案解析：

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第47题__________A．Jennifer Thompson decided to meet Cotton and apologize to him p

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Which of the following could best replace the word "band" in "We can think of i

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