How much ..... you earn?
do
does

..... London have many museums?
do
does

..... it snow a lot in Iceland?
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does

..... you speak English?
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does

..... they live in London?
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does

..... you have a car? 
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does

..... your parrot talk?
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does

What ..... we have to do for homework?
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does

What time ..... this class finish?
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does

How often ..... you rent a video?
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does