单项选择题

We must finish the job, no matter ______ difficult it is.

[A] however
[B] how
[C] whatever
[D] what

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单项选择题

--Do you know ______ the price of meals on the railway has increased recently--Yes, by 15%.

[A] how long
[B] how often
[C] how much
[D] how soon

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