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1£®We'd better drink ________(ÉÕ¿ªµÄ)water, or we'll be sick£®
2£®The ________(É豸)of our factory is worth ¡ç100 000£®
3£®Weigh it on the ________(Ììƽ)£®
4£®This machine is driven by ________(µç)£®
5£®Ice ________(ÐγÉ)at 0¡æ£®
6£®We were dressed up for the party but she was still in her ________(ƽ³£µÄ)clothes£®
7£®We came to the ________(½áÂÛ)that the room must have been empty£®
8£®Iron has ________(²¿·Ö)reaction with water£®
9£®The ________(Ä¿±ê)of the experiment is to find out which of the metals doesn't react with water£®
10£®He noticed a piece of wood ________(Ư¸¡)on the water£®
11£®Air is a ________(»ìºÏÎï)of gases£®
12£®Sugar ________(ÈÜ»¯)in water£®
13£®Any object ________(ÅòÕÍ)when heated in water£®
14£®Metals ________(ËõС)as they get cooler£®
15£®Chemical changes can produce new ________(Îï×Ê)£®
16£®Putting an acid and a metal together causes a ________(·´Ó¦)£®
17£®The ________(É豸)for teaching in our school are very advanced£®
18£®There are a lot of great men in our nation that we ________(Ϊ¡¡¸Ðµ½½¾°Á)£®
19£®We all felt ________(¾ªÆæ)on hearing she was injured in an experiment£®
20£®She ________(Ó¦¸Ã)do the chemistry experiment carefully£®
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