Her father began to learn a foreign language (when he was 40 years old).对划线部分提问Simon bought （three） boxes of cookies in the USA. 对划线部分提问

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• Her father began to learn a foreign language (when he was 40 years old).对划线部分提问Simon bought （three） boxes of cookies in the USA. 对划线部分提问
• Her father began to learn a foreign language (when he was 40 years old).对划线部分提问
• _the temper told me he_______in this school for more than twenty yearsA、had worked B、have worked C、has been reading
• Left,until now,to odd,low-level IT…英文解释Left ,until now,to odd,low-level IT staff to put right,and seen as a concern only of data-rich industries such as banking,telecoms and air travel,information protection is now high on the boss's agenda in businesses of every variety.其中的left和right在这是什么意思.有什么用?