They work hard----------their lessons

They need to work hard at their lessons怎么讲这句话改为一般疑问句? the student work hard at their lessons.的意思 they work hard,but their efforts are not very p------ They have made much progress_____ their hard work They have made much progress__(用）their hard work. They worked hard ____they finished their work ahead of time. Students ____ ____ ____（应该）work hard at their lessons. Mary and Jenny work hard at their lessons and ____of them ar （）of the students work hard at their lessons.A.Many B.Much they both study hard and are ____ at their lessons well good They work hard to improve their English.(同义转换) They work har They work hard ( ) us.