15.1 has to 2 swim 3 wear 4 run 5 arrive 6 outside
①1-4 DBCB
②1-5 DACBA 6-10 DBDCA
16.1 Why isn't2.Don't arrive 3.What;do 4 doesn'thave 5.to learn
①1-5 CCCCD 6-10BCCAC
②1-5 1. many 2.has 3.do 4.on 5.go 6.clean 7.her 8can't 9.never 10. help
③1-5 ABCDA 6-10 BCDAC
④1-5 TFTFT
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