child（复数形式）________

I can’t see  in the sky. (   )

A．a moon

B．the moon

C．moons

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.

—How many ________ are there? (   )
—Ten!

A．elephant

B．monkeys

C．monkey

Every family has a family ________.

A．relatives

B．names

C．trees

D．tree