Question

---Could I go boating this weekend, Dad?---Yes, you ________. But you ________ come back before...

---Could I go boating this weekend, Dad?---Yes, you ________. But you ________ come back before lunch. A．could; must B．can; must C．could; should D．must; should

Answer 1

B

试题分析：句意：这个周末我能去划船吗？是的，你可以。但是你必须在午饭前回来。Could you do …?中的could表示委婉语气，不是过去时态。故回答是经常用，can. Must,必须，表示一种主观看法。should,应该。表示某钟责任和义务。根据句意，故选B。