Do the Smiths live next to you?No,but they ().a.used to b.used to do it c.used to be d.used选哪个,为什么详细点 如果是used to do对吗,

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DotheSmithslivenexttoyou?No,butthey().a.usedtob.usedtodoitc.usedtobed.used选哪个,为什么详细点如果是usedtodo对吗,Do

Do the Smiths live next to you?No,but they ().a.used to b.used to do it c.used to be d.used选哪个,为什么详细点 如果是used to do对吗,
Do the Smiths live next to you?No,but they ().a.used to b.used to do it c.used to be d.used选哪个,为什么详细点 如果是used to do对吗,

Do the Smiths live next to you?No,but they ().a.used to b.used to do it c.used to be d.used选哪个,为什么详细点 如果是used to do对吗,
A
used to do sth 过去常常做某事
这里省略了括号部分used to ( live next to me)

A,是省略,but they used to live next to me.
used to do 不对

答案C
used to be 过去是
used to do 过去常常做某事