| 19.5.8 Exercise 8: Interrogative adverbs | 
| Exercise 8 | ||
| When did he arrive? | 
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| When do you do it? | 
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| How much money do you still have? | 
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| Why did he not come? | 
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| How was he able to solve the problem? | 
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| With how many fingers do you type on the keyboard? | 
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| On how many platforms do  you test?  | 
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| Since how long have you already been here?
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| After how long can we see the first results? | 
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