单项选择题

He was very sorry _______her at the airport.

A． not to meet
B． to not meet
C． to have not met
D． not to have met
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I'll lend you my computer _______you promise to take care of it.
A． unless
B． as
C． while
D． if
单项选择题
Which do you think is _______important, wealth or health
A． more
B． most
C． the more
D． the most
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