单选题
Why were they worrying all the evening? [A] Because they were afraid that someone might steal their paintings. [B] Because they didn't know who to thank for the tickets. [C] Because the streets were wet and it was dangerous to drive.
【正确答案】
B
【答案解析】[解析] 题目是“他们为什么一晚上都在担心”。此题可以在短文第五段最后一句中找到答案。“because they were worrying all the time about finding the person who had sent them the tickets．”意思是“他们一直想找到到底谁给他们送的票”所以答案为[B]。