单项选择题

I don"t think Mary understood what you said, ______

A．do I
B．didn"t she
C．did you
D．did she
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单项选择题
You can hardly imagine Belt ______ a meal.
A．to be cooking
B．cooking
C．to cook
D．cook
单项选择题
She began to ______ something but stopped when she heard the teacher ______.
A．tell; saying
B．speak; talking
C．say; speaking
D．talk; telling
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