单项选择题

It is difficult to design_________ programthat will meet _________various needs of all our users.

A．the;the
B．a; the
C．/;the
D．/;/
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单项选择题
I_________ far too hard today and I've got such a headache now.
A．had worked
B．have been working
C．shall work
D．work
单项选择题
What does the man mean（）

A．He likes his professor
B．He wants a new task
C．He needs more time
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