Question

When ____________ Mary ____________ to school?

A．is, go

B．do, go

C．do, goes

D．does, go

Answer 1

Ｄ

goto school,去上学；go是实义动词，变问句需要借助于助动词，且主语Mary是第三人称单数，所以用does，助动词之后跟动词原形。所以选D。