UNIT 6 I HAVE FIFTY MARKERS Lesson 20同步练习一、读读写写。二、判断下列句子与图片是()否()相符。( )1. You have so many markers. ( )2. I have forty pencils. ( )3. What do you collect? I collect erasers. ( )4. Twenty plus forty is sixty. 三、单项选择。( )1. You have so many _. A. pencil B. pencils C. pencils( )2. _ do you collect?I collect erasers.A. What B. When C. Who( )3. Lets put _ together.A. they B. their C. them( )4. Twenty _ ten is thirty.A. minus B. plus C. bus( )5. May I borrow your markers, please?_.A. Thank you B. Here you are C. Yes, I do四、看图, 补全下列句子。1. I have _ erasers.2. I collect _. I have _.3. You have so many _.I have _.4. What _?I collect _. I have _.5. You have so many _.I collect _.参考答案一、略二、1 2 3 4三、1. B 2. A 3. C 4. B 5. B四、1. forty 2. rulers; twenty 3. erasers; ten4. do you collect; pencils; fifty5. books; books儿童心理发展是有顺序的，这是由遗传决定的，不会因为各种外部环境的影响，或者学习、训练的作用而发生改变，出现心理发展的超越或逆转。人类个体从出生到成熟再到衰老的过程中心理的发生发展。既是个体自身发展成熟的过程，又是一个社会化的过程。3