翻译：务必在离开教室之前关掉所有的灯.(do+v.)
问题描述：
翻译：务必在离开教室之前关掉所有的灯.(do+v.)
答
Do turn off all the lights before leaving the classroom!
翻译：务必在离开教室之前关掉所有的灯.(do+v.)
Do turn off all the lights before leaving the classroom!