【单选题】We should________the lights when we leave our classroom because we must save electricity. [ ]
【单选题】That is the tallest building in our city
【单选题】We should try our best to the children from danger.
【判断题】仰泳的空中移臂应以高肘屈臂放松向前移动,入水时手臂贴耳朵
【单选题】That is the tallest building ____ the city.
【简答题】英译汉:We should leave the passengers a very good first impression with our sweet simle when they borad the plane.
【多选题】就《天文漫谈》介绍,以下哪些恒星属于红巨星?