单项选择题

Far too many owners of electric appliances have a hard time （） qualified repairmen to fix their ma- chines.

A．finding
B．to find
C．to finding
D．having found

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单项选择题
（）, the researchers cannot concentrate on that very precise experiment.

A．With you standing there
B．On your standing there
C．You are standing there
D．You stand there
单项选择题
I'll never forget （） you for the first time.

A．to meet
B．meeting
C．to have met
D．having to be meeting
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