The naughty boy spends most of his time playing computer games ______ his lessons.[ ]

下列各句中，没有语病的一句是（ ）

Hurry up! The film ______for ten minutes.

Sam, you have studied for two hours. Why don’t you stop a rest.

There are differences in spelling and pronunciation_______ AmE and BrEThat means AmE is more or less different _________BrE