—I called you at 4:00 yesterday afternoon, but no answered.

—Sorry, I ____ with my friends at that time         [ ]

A. swim          

B. swam

C. will swim        

D. was swimming

著明画家张大千所画的一幅名事“月夜虎山行”，画的落未所记的年月日是“写于甲申年仲夏朔”。“仲夏”是( )。

A．农历六月

B．农历四月

C．农历五月

D．农历八月