自然人在战争期间下落不明的，应经过( )年，可申请其宣告死亡。

A．1

B．3

C．4

D．5

Speaker A: Hey, why don’t we go out and do something tonight I feel kind of bored.
Speaker B: ().

A. You shouldn’t feel bored with so many assignments to finish.

B. Would you like to go dancing with me

C. Sometimes I also feel bored staying at home all day.

D. I wish I could. But I really have to stay in and write to my parents.