单项选择题

Sunday school programs available for children of all ages.（）

A. Children must study the programs every Sunday.
B. If they like, all children can take these programs.
C. The programs only admit children above eight years ol

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Do not expose the unit to rain or moisture.（）A. This eq...

单项选择题Do not expose the unit to rain or moisture.（）

A. This equipment should be placed in a dry place.
B. It does not matter if the unit is cleaned with a wet mop.
C. It can only be used in a sunny day.