Unit14:A：CBDBACABDC B:DCBCBDCDBA C:ABDBCACCDA D:ABCADBCDBC E:CBBDACDADD F:CAADCCCDBA

A:1/how 2/at 3/colder 4/.weather 5/more 6/could 7/again 8/before 9/so 10/collecting

B:1/capital 2/collecting 3/raise 4/anyone/anybody 5/several/some 6/public 7/since 8/rather/quite/very 9/break

10/careful

C:1/country 2/first 3/meet 4friends 5/see 6/polite 7/stand 8/stand 9hands 10If

D1/got 2/them 3/who 4did 5/made 6/was 7/hear 8/like 9/went/walked 10/find

Unit15:A:ABCBDACBBD B:AABCAABDCD C:ACBADBDABB D:lCBABADCDBA E:DABBCCDAAC F:CBBDBCCACB

A:1/different 2/.mean 3/colors 4/leave 5/bpth 6sure 7/another 8/luck

B:1/four 2/terrible 3/if 4ground 5/take 6/heard 7nothing 8used

C:1/first 2/decided 3/got 4/happily 5/lunch 6/stopped 7/then 8/eyes 9/fewer 10/left

D:1/callde 2/dark 3/during 4/understand 5/best 6/they'll 7/environment 8/temperature 9/whenever

10/from

Unit16:A:BBADBCABDC B:DACDDACBBC C:BBDBDACDDC D:CBCADCDACD E:CDBBCAABAD F:BCBACBCBACCACBA

A:1/important 2/stndents 3/plan 4/makes 5/hour 6/writing 7/schools 8/twice 9/exercise 10/eyes

B:1/listen 2/only 3/examlie 4/find 5/yourself 6/interested 7/good 8/working 9/other 10/all

C:1/found/felt 2/anything 3/out 4short 5/when 6/answer 7/with 8/and 9/hand 10/policemen

D:1/bring 2/good 3/seem 4/few 5/answer 6/usually 7/themselves 8/remembering 9/ways 10/early