实验B是探究铁钉生锈的条件，中间试管的实验目的是55。
18．
10． After the rebuilding，our school is becoming _________ ．
14．
1． Lucy and Lily ________sisters． They study at the same school．
14．
28． Before going shopping， Ruth cleans the house．
18．
（四）储蓄人生
“金银铜铁锡”俗称五金。在这五种金属中，金属活动性最强的是
文章的主要人物是母亲，但作者却在第⑦段写“弟弟酗酒”一事，试说说其写作意图。(4分)
春暖花开季节，滨河路边常闻到怡人的紫丁花香味 ，这一现象说明
38．—__________ do you want _________for a party
—Your French is so good. How long have you been in France
10． We had fun ___________ our bicycles to the beach last Sunday．