填空题


【参考答案】

在smith和a之间加for。
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填空题
将However改成Thus或Consequently。
单项选择题
A．make every effort to prevent mistakesB．find the best sources of informationC．maintain a positive attitude at all timesD．take risks
A．make every effort to prevent mistakes
B．find the best sources of information
C．maintain a positive attitude at all times
D．take risks
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