单项选择题

Could you tell me______ in the Russian alphabet

A．how many letters are
B．how many letters are there
C．how many there are letters
D．how many letters there are
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Firms that use computers have found that the number of staff_______is needed for quality control can be substantially reduced.
A．whose
B．as
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We agreed to accept ______ they thought was the best tourist guide.
A．whatever
B．whomever
C．whichever
D．whoever
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