读一读，选择正确的单词补全句子。
【小题1】I have _________ (second / two) pens.
【小题2】Can I have __________ (a / an) apple, please?
【小题3】My classroom is on the ___________ (first / one) floor.
【小题4】How many __________ (ruler / rulers) do you have?
【小题5】Let us clean the __________ (teacher's / teachers') office.

选出不同类的单词：(   )

A．factory

B．the

C．hospital

There is _______ "f" and _______ "u" in the word "fruit".

A．an; a

B．a; an

C．a; a

D．an; an

This is _________ elephant. ( )

A．some

B．/

C．a

D．an

选择出不同类的单词。

【小题1】

A．helped B．happened C．wants

【小题2】

A．a B．an C．the

【小题3】

A．in B．out C．to

【小题4】

A．seven B．again C．ten

【小题5】

A．fun B．nice C．bad