1-5 bddbd    6-10 acbbd     11-15 ccbac     16-20 bdbcd     21-25 bbbba     26-30 bbbdc

　　31 death 32 succeed 33 waste 34 throwing 35 realized 36 spend 37 playing 38 to pla39 be allowed 40 to do 41 have had 42 largest 43 to feed 44 thousand45 iknown 46 did use 47 how doe48 how to 49 if visited 50 heard to 51 instead of 52 have cut 53 take pride in 54 iregarded as

　　1-5 bdcca     6-10 caaad     11-15 dbca    16-20 ddcaa    21-25 bcbad     26-30 adcaa

　　31 happ32 me 33 boating 34 enjoyed 35 relaxing 36 graduating 37 favorite 38 later 39 to start 40 grow 41 would like 42 what kind doe43 to go 44 too young to 45 ibad for 46 let down 47 aapossible 48 to deal with

　　1-5 bcbda     6-10 daaa    11-15 abbac     16-20 acaaa    21-25 bccdb

　　26 lend 27 trouble 28 wonder 29 scientific 30 endangered 31 caused 32 cool33 are 34 become 35 fall 36 found 37 potatoe38 around 39 were moving 40 scared

　　41 how doe42 usedn’t there 43 can’t afford 44 belong to 45 cheer up 46 hastudied 47 could please tell 48 waasked built 49 took place 50 imade 51 whatever stop 52 been/ got used 53 made sad 54 made thought 55 haconcentrated on