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What do you usually do ________ Christmas?

I like to watch football games______ TV.

A．on               B．at                C．in                D．from

I’ll be ready _____________a minute.

A．on                                   B．at

C．for                                  D．in

What’s this ________ Chinese?

A．in               B．at                C．of               D．on

The snake lives ________ grassland.