预测一关注环境保护,增强环境意识 1. We believe scientists will ______ a way to solve the problem of air pollution. A. set off B. put off C. come up with D. catch up with 【解析】此题的句意是“我们相信科学家们将会想出解决空气污染的办法”。选项A是“出发”,B是“拖延、延期”,C是“想出、发现”,D是“赶上”。
预测二增强识图能力,注意联系生活实际 2. Which is the following is NOT a traffic sign(交通标志)?