The Math problem is too difficult , we really don’t know ________ to do it .
#37139
A
which
B
where
C
what
D
how
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As a new graduate, he doesn’t know _______ it takes to start a new business.
#78969
A
how
B
what
C
when
D
which
—Can you tell me ________ to send this postcard to New York by airmail?—Let me check. Oh，it’s one dollar.
#39022
A
how long it takes
B
how much it costs
C
who can help me
D
if there’s a post office
— Excuse me. Could you tell me _______?— It will leave at 4:00 p.m.
#38634
A
how will you go to Beijing
B
how you will go to Beijing
C
when will the bus leave for Beijing
D
when the bus will leave for Beijing