将下面的两句英语进行同义句转换
1、Half an hour,we felt tired.
______ _______ ________ _______ ,we felt tired.
2、Pass the post office,you will see a tall building in front of you.
_________ ____________ ________pass the post office,you will see a tall building in front of you.
參考答案:1、After two hours /Two hours later.
2、When you /If you这里好象多了一横.
