单项选择题

Far too many owners of electric appliances have a hard time ______ qualified repairmen to fix their machines.

A. finding
B. to find
C. to finding
D. find
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单项选择题
The ATMs enable bank customers to access their money 24 hours a day and seven days a week ______ ATMs are located.
A. wherever
B. whenever
C. however
D. whatever
单项选择题
The issue ______ at the conference now is very important and it will create a sensation nationwide.
A. discussed
B. being discussed
C. discussing
D. to discusss
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