用 must, mustn’t, may, may not , can 或 can’t 填空。 This is Mrs Lee’s first trip to Canada. She (1) _____________ only speak a little French and a little English . Today, she will go the Canadian Embassy to get visas for the family. She knows she (2) ___________ forget to take all the family’s passports with her or they will not get visas. She (3) _______________ get there before the embassy closes. Dean has just bought three pairs of skis. He is trying , but he (4) _________________ carry them all at the same time. He wants to take a taxi home, but the taxis won’t stop for him. He (5) _________________ find a taxi queue if he wants a taxi.