根据括号中的数字填写合适的序数词或基数词（写单词）。
1、Bill is _________（11）years old , he is in Class_______（2）Grade_______（4）.
2、My birthday is on the_______________（3）of March .
3、September is the _______________（9）month in a year .
4、Which boy is thinner , the ______________（1）one or the ___________（2）one ?
5、There are _____________（12）apples on the desk .

按要求写词。
【小题1】five(序数词) ____________
【小题2】twenty-three(序数词) ____________
【小题3】eighth(基数词) ____________
【小题4】fourth(缩写形式) ____________
【小题5】fun(形容词) ____________
【小题6】thirty-second(缩写形式) ____________
【小题7】twelve(序数词) ____________
【小题8】forty(序数词) ____________
【小题9】nine(序数词) ____________
【小题10】open(形容词) ____________

将下列基数词变为序数词。
【小题1】one _______
【小题2】two _______
【小题3】three _______
【小题4】four _______
【小题5】five _______

Summer is the _______ season of the year.  (  )

A．second

B．two

C．three

用所给单词的正确形式填空。
【小题1】She will come back home on June ______ (twenty-one).
【小题2】Tomorrow will be a sunny day. We ______ (have) a picnic tomorrow afternoon.
【小题3】We will have an important ______ (meet) next week.
【小题4】There are twelve ______ (month) in a year. The______ (nine) month is September.
【小题5】I ______ (plan) for my study now.