let me know when you ( )town.A.reture back toB.return to C.will return to D.retured back to

问题描述:

let me know when you ( )town.A.reture back toB.return to C.will return to D.retured back to
是b还是c啊?//~急

应该选择B
let me know 是个祈使句,从句when引导的时间状语要用一般现在时代替将来时,you 是第二人称,所以后面的return应该用原型.
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