单项选择题

Liu Xiang was awarded a gold medal in the World Championships. He（）a lot of hard training.

A. should have done
B. should do
C. must have done
C. must do

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—I can’t see the blackboard very well. —Perhaps you need（）

A. to examine your eyes
B. to have your eyes examined
C. examining your eyes
D. to have examined your eyes
单项选择题
Over ten people died and twenty people were ______ wounded in the train crash.
A. eventually
B. urgently
C. bitterly
D. seriously
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