signs on doors tell you ____ to go in or out .A which B where C ._英语解答

signs on doors tell you ____ to go in or out .A which B where C .how 为什么?

人气：159 ℃　时间：2020-01-27 20:46:07

解答

Signs on doors tell you (where) to go in or out .
门上的标志告诉人们在哪里进出.