试题:
—Look at the flowers I gave you last month. They are dying! ________ do you water them?
—Sorry, I forgot to water them.
A.How longB.How often
C.How soonD.How much

答案:

我来补答
B

试题分析:句意:——看看我上个月给你的花。他们快死了!你多久给他们浇一次水?——对不起,我忘了给他们浇水。A. How long 对长时间,对时间段提问;  B. How often多久一次,对频率提问;C. How soon 多久,对将要用多长时间提问;D. How much多少,对价格提问。根据do you water them?这是一般现在时。可知此处问他经常给花浇水的频率,多久一次,故选B。
 
 
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这些题目你会做吗?