单项选择题

I was very sleepy. I tried ______ my eyes open but I couldn't.

A．keeping
B．having kept
C．to have kept
D．to keep
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单项选择题
As a teenager, I started worrying about my figure and the way I ______.
A．appeared
B．seemed
C．thought
D．saw
单项选择题
It is time to begin the class, but the teacher doesn't ______ still.
A．look up
B．take up
C．make up
D．turn up
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