在一个边长为40米的正方形花坛四周摆花，每隔2米摆一盆花，共摆多少盆？
40×4÷2，
=160÷2，
=80（盆）．
答：共摆80盆．
—Do you know when Britain________war on Germany during the Second World War?
—In 1993，I suppose.
A．announced
B．declared
C．fought
D．attended
折边
