We always go swimming _____ Friday. (   )

A．at

B．on

C．in

I play basketball ________Sundays. (   )

A．on

B．in

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.

We left Beijing __________ February 1st. (    )

A．in

B．at

C．on

D．for