Lesson 31 Surprise your friendsDig in :1.surprise :(v) 使某人惊讶 Eg: You surprised me just now.(n) 惊讶 to ones surprise 使某人惊讶的是 in surprise 吃惊地surprise surprising (adj)物令人惊讶surprised (adj)人惊讶的Sb be surprised at 2.Brian,Jenny and I did an experiment in science class.人称的顺序：单：二，三，一 复数：一，二，三 做错事时 ，第一人称在前。3. Get a glass full of water .4.Hold it over your friends head.5.Keep your hand on the cardboard .6.The cardboard will hold the water up.7.Air is heavier than we think.8.It pushes down on us from above.9.It also pushes up on us .10.in the experiment 11.Dont you think so ? Yes, I do . No ,I dont.Exx:( ) 1-Didnt you go hiking with them?-_.A.Yes ,I didnt B.No ,I didntC .Yes ,I dont D.No ,I did.( )2.Mum took _to the Great Wall last week.A.my sister and I B.I and my sister C.me and my sister D.my sister and me