题目

—Philip has gone to New Zealand. —Oh, can you tell me ________？ A．when did he leave   B．when he is leaving C．when he left        D．when is he leaving 答案：C13．把一根长5米的铁丝平均分成8段，其中3段是这根铁丝的$\frac{3}{8}$，每段长$\frac{5}{8}$米．