1. <u>It's just like the old days</u>. <br/><br/>2. we are going to have some fun and wash it overselves <u> just like in the old days.</u><br/><br/>I thought the underline of sentence (1) and that of sentence (2) is very similiar pattern.<br/><br/>but sentence(1) doesn't have a prepositon "in" but sentence (2) does. <br/><br/>I don't understand this difference.<br/><br/>Could anyone tell me about that problem?