第1个回答 2012-01-11
看你是哪个年级的了,一般也得分类型,如果是环境类的,population,person,envirement比较多
第3个回答 2011-12-29
Then When Where when she he who
第4个回答 2011-12-29
the this when which as
第5个回答 2013-08-14
including include though although back front inside because until till unless if more less share show surprise surprised surprising even pay