单项选择题

Being defeated for the third time, it seemed to him that it was no use_______ anything any more.

A．to try doing
B．trying to do
C．to try to do
D．tried to do
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单项选择题
The Great Pyramid ________the west bank of the Nile River, not far from Cairo.
A．is located on
B．is situated in
C．is located at
D．is situated of
单项选择题
For a green-hand babysitter, it seems a very difficult task ______.
A．to stop the child to cry
B．to stop the child crying
C．stopping the child to cry
D．stop the child crying
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