My birthday is _______ spring. (    )

A．in

B．on

C．at

按要求完成句子。
【小题1】— When is the school trip? — It’s _________.
【小题2】My birthday is ____________.
【小题3】 ________ is the maths test? It’s ____________.
【小题4】We will have a party ________ Children’s Day.
【小题5】The ________ month of a year is April.

—_____ is your brother’s birthday? (  )
—His birthday is _______ July.

A．What; in

B．When; in

C．Where; in

D．How; for

I’m going to school _______ Monday morning. ( )

A．at

B．in

C．of

D．on