未知题型
M any schools will not open for lessons until thebeginning of September.英译汉
很多学校到九月初才开学。
未知题型 我国目前民航机场的跑道通常用()筑成、()筑成。
未知题型 天敌这一生态因子属于 ( )
未知题型 They were brought up under the same roof when they were young.英译汉
