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
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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
单项选择题
I would like to say a big thank-you to everyone_________ has helped to make our meeting a great success!
A．which
B．that
C．who
D．whom
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