【摘要】山东省菏泽市长城中学高一英语模拟试题含解析 一、 选择题 1. Scientists are convinced _____ the positive effect of laughter physical and mental health. A. of, at B. by, in C. of, on D. on, at 参考答案: C 略 2. we could afford it, we wouldn’t go abroad for our holidays. A. Since B. As though C. If D. Even if 参考答案: D 3. — May I smoke here? — If you _____, choose a seat in the smoking section. A. could B. should C. must D.