花生四烯酸在日光作用下可合成（）。

A.维生素C

B.维生素D

C.维生素B

D.维生素E

E.维生素B₁₂

My family always have a party ______ the evening of October 1, and the party starts ______ 8. 00 p. m.

A．at; in

B．in; on

C．at; on

D．on; at