--- __________ did Charles Smith hiccup?  --- For about two weeks.
#62164
A
When
B
How
C
How long
D
How often
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--Excuse me. May I speak to Mike, please? --______________.
#62054
A
Yes, I am.
B
Do you know him?
C
I am speaking.
D
This is Mike speaking.
—____________________________?—It’s Wednesday.   
#61997
A
What’s the day
B
What’s the time
C
What day is it today?
D
What’s the date today?
——_________ should your robot need_________ batteries?——Every two months.
#62268
A
How soon, to be changed
B
How long, to change
C
How much, change
D
How often, to change