该选哪一个?-Do the Blacks lives next door to you?-No,but they ______?A.used to B.used to doC.are used to D.used todbe

该选哪一个?-Do the Blacks lives next door to you?-No,but they ______?A.used to B.used to doC.are used to D.used todbe
该选哪一个?
-Do the Blacks lives next door to you?
-No,but they ______?
A.used to B.used to do
C.are used to D.used todbe

该选哪一个?-Do the Blacks lives next door to you?-No,but they ______?A.used to B.used to doC.are used to D.used todbe
选A
解析：首先used to do sth.是一个固定搭配,过去/曾经做过某事,因此可排除C；其次,这个题是省略用法,如果写完整,应该是No,but they used to live.这个题将live省略了
翻译：布兰克一家住在你隔壁吗?——不,他们曾经住在我隔壁过

选A，考查了省略的语法，but they used to （live next door to you）。

A