单项选择题

Before Keith started to point out the problem she had found, she was very ______.

A．embarrassed
B．foolish
C．cautious

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单项选择题

A．in
B．under
C．at
D．on

单项选择题

A. a client
B. a creditor
C. a chairperson
D. a salesman
E. an employee
F. a traveler
G. a driver
H. a doctor

Before Keith started to point out the problem she had found, she was very ______. 您的浏览器不支持 audio 元素。