一、 DCCBBDDCDB
    二、 1、fifth 2、minutes 3、easily 4、friendly 5、shelves 6、usual
    7、brother’s 8、colourful 9、quietly 10、healthy
    三、DFAEC
    四、CBACBDDAAC
    五、1、spend or 2、Shall we 3、different from 4、less than 5、too young to
    六、DCBCA
    七、1、Chen Hua wrote this invitation letter
    2、The students of Class 3, Grade 7.
    3、At Wang's Reatuarant on Nanjing Road
    4、On Saturday,30th May.
    5、Yes,there is.
    6、It's in Wangfu Street
    練習(xí)二
    一、 DCDBABCABB
    二、1、knives 2、third 3、qucikly 4、driver 5、lives 6、teeth 7、lovely 8、poisonous 9、western 10、loaves
    三、EDBFA
    四、BBCDAADCDA
    五、1、There are in
    2) goes by bike
    3) How cold
    4) for supper
    5) How much cost
    六、BBCAB
    七、CADBBDACDC