twenty (  )

A．12

B．20

C．21

three + seven=__________（   ）

A．twelve

B．nine

C．ten

根据提示完成句子。
1. There are ________________ (20把椅子) in the classroom. 
2. The pencil box is ________ the desk. (在···上)
3. Steven is drawing on the ________.
4. ________ name is Li Ming. ________ is a boy.
5. —How many ________ are there? (55支铅笔)
—There are ________.

补全下列单词，并翻译成中文
1. sev __ __(  )    2. ei__ __teen(  ) 3. fi__e(  )
4. s__x(  )    5. thr__ __(  ) 6. __ __ght(  )
7. tw__(  )    8. fi__teen(  ) 9. m__ __ning(  )

写数字。
【小题1】七十___________
【小题2】七十二___________
【小题3】七十三___________
【小题4】七十五___________
【小题5】七十四___________
【小题6】八十___________
【小题7】八十三___________
【小题8】八十七___________
【小题9】八十八 ___________
【小题10】八十九___________