-David.could you tell me ?-Twice a week．( )A．when you do exerciseB．how often you do exerciseC．how many times you do exercise 题目和参考答案——青夏教育精英家教网—

8．-David，could you tell me____________？
-Twice a week．（　　）

	A．	when you do exercise		B．	how often you do exercise
	C．	how many times you do exercise

分析 -大卫，你能告诉我多久锻炼一次吗？-一周两次．

解答正确答案：B．A是你什么时候锻炼，B是你多久锻炼一次，C是你锻炼多少次．Could you tell me…是一个宾语从句，三个选项引导词都不同，那么根据答语Twice a week可知是频率的提问，故选择B．注意how often是询问频率，多久，而how many times强调次数，总共多少次．

点评本题考查宾语从句，根据答语即可作出选择．C项是干扰项，所以一定要注意how often和how many times的区别．

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