选择翻译正确的句子。 1. 我可以去北京旅行吗? [ ] A. May I go on a trip to Beijing? B. May I go to Beijing? 2. 我乘坐飞机去加拿大。 [ ] A. I go to China by plane. B. I go to Canada by plane. 3. 我早上六点开北京。 [ ] A. I leave in Beijing at 6: 00 in the evening. B. I leave Beijing at 6: 00 in the morning. 4. 火车比公共汽车快,比飞机慢。 [ ] A. A train is faster than a bus, but slower than an airplane. B. A train is slower than a bus, but faster than an airplane.