1.-How can I tell one tree from another?(翻译一下这句)

1.-How can I tell one tree from another?(翻译一下这句)
-You can mostly tell them by the () of their leaves.
A.shape B.size C.age D.color
2.See you n_____ year.(后会有期)
I don't want to see you a____.(我不想再见到你)
括号里的意思是我认为的,如果你们觉得不对,就看下面这段,When they said goodbye to each other,they were polite ,saying,"Thank you very much.See you n_____ year."In fact ,however,they both thought,"I don't want to see you a____."