下面的文字、排列顺序与原文一致的是。（ ）1.难道你又不更远一点想到，这样枝枝叶叶靠紧团结，力求上进的白杨树，宛然象征了今天在华北平原纵横决荡，用血写出新中国历史的那种精神和意志 2.当你在积雪初融的高原上走过，看见平坦的大地上傲然挺立这么一株或一排白杨树，难道你就只觉得它只是树 3.难道你竟一点也不联想到，在敌后的广大土地上，到处有坚强不屈，就像这白杨树一样傲然挺立的守卫他们家乡的哨兵 4.难道你就不想到它的朴质，严肃，坚强不屈，至少也象征了北方的农民

________ can make people healthy.

________ Tom ________ Mary speaks good Chinese, so they can communicate with these Chinese students very well.

We are going to spend the Spring Festival in Guangzhou, ____ live my grand parents

I don’t like any humor in serious speech because I can’t think of any circumstance _______ this would be beneficial or useful.