题目内容

Though modern communication technology is so developed, I received letters from my parents ________.

[　　]

A．at a time
B．at one time
C．at times
D．at any time

答案：C
解析：

解析：at a time意为“一次”；at one time意为“曾经，在过去的某个时候”；at times意为“有时”；at any time意为“在任何时候”。本句意为：虽然现代通讯技术这么发达，但我还是有时收到我父母的来信。因此C为正确答案。


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1. Was Mona Lisa painted by Leonardo da Vinci?
    _________________________________________________
2. When was Leonardo da Vinci born? 
     _________________________________________________
3. What did Leonardo da Vinci design?
     _________________________________________________
4. Why did Leonardo da Vinci cut up dead bodies in hospitals?
     _________________________________________________
5. What was Leonardo da Vinci according to the passage? 
     _________________________________________________

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