将并列句改为复合句1.theyaretwinsbuttheyhaveneverseeneachother
2.gothiswayandyoucanreachthepostoffice
3.theoldmanturnedandhispetcatfollowedhim
4.theboy“sfatherbeathim,forhebehavebadly
5.thepolicemanranupfast,andhecaughtthethiefbythearm
6.hurryup,orwewillmisstheeralybus