( )_____your brother use to eat a lot of chocolate? A.does B.did C.do D.will

B是正确的
used to是过去常常，这里意为他过去常常喜欢吃巧克力么
变为一般疑问句就变为Did ....use to...

B.did
used to do sth过去常常做某事，疑问句形式是Did … use to do sth

b.used to do过去常常。一般疑问句句首加did，used还原成原型。

A used to do是过去常常做某事.所以用过去式did

a

a