单项选择题

Prior to our conference, the executive director had requested that everyone _______ well prepared.

A．is
B．be
C．was
D．will be
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单项选择题
_______ if I had arrived yesterday without letting you know beforehand
A．Would you be surprised
B．were you surprised
C．Had you been surprised
D．Would you have been surprised
单项选择题
Samuel has curly hair but his twin sister's is quite ______.
A．even
B．straight
C．uneven
D．regular
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