elective system是什么意思？

• default
• 解决方案英文
• cheese
• pear
• 缺陷英文
• 参与者英文
• searches
• 造型的英文
• 长颈鹿英语怎么说
• 分配英文
• theatre
• supper
• aspect
• candy
• scared
• organizations
• approaches
• general
• profile
• PEGGING
• crayon
• intermission
• cloud
• permitted
• various
• 来源英语
• 旋律的英文
• prompt
• committing
• BARRIE

• erased
• client
• begins
• lake
• text
• monitor
• panicked
• saturday
• sweater
• 方案英语
• silver
• volume
• 权限英文
• satisfaction
• 领域英语
• passage
• mind
• fake
• bombarded
• polite
• modernize
• vehicle
• 抛弃英文
• maths
• tomato
• emergency
• rice
• peeping
• giraffe
• 导师英文

• answer the phone
• clean the room
• cook dinner
• draw pictures
• listen to music
• read a book
• see you later
• write a letter
• drink water
• catch butterflies
• collect leaves
• count insects
• do an experiment
• pick up leaves
• watch insects
• write a report
• traffic rule
• after school
• science museum