甲、乙二人绕周长为1200米的环形广场竞走，已知甲每分钟走125米，乙的速度是甲的1.2倍，现在甲在乙的后面400米，问：乙追上甲还需______分钟．

Tom was absent from school this morning, because sometimes he was a little weak and could ______ill .

A．take

B．set

C．catch

D．fall