4.rang,rung

　　5.sat,sat

　　6.wrote,written

　　7.camecome

　　8.taught,taught

　　13.caught,caught

　　14,bought,bought

　　15,thought,thought

　　16.flew,flown

　　17.drew,draw

　　希望你能把这些装进脑袋,否则考试怎么办呢?