【单选题】Passage 2Mary and Peter were having a picnic with some friends near a river when Mary notice an object overhead. “Look!” she shouted to her friends. “That’s a spaceship up there and it’s going to land...
【简答题】Most American school students have a long summer holiday. It is usually from June to September. During this holiday students often travel or have summer work. Some students take courses in summer scho...