单项选择题

（） to upset him, the comedian always had a quick, sharp reply.

A．No matter whether people in the audience tried
B．No matter how hard people in the audience tried
C．No matter who people in the audience tried hard
D．No matter how people in the audience tried hard

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单项选择题

Though the long-term （） cannot be predicted, the project has been approved by the committee.

A．affect
B．effort
C．effect
D．afford

单项选择题

When he arrived, he found （） the aged and the sick at home.

A．none but
B．none
C．nothing but
D．no other than