—__________ do I have to change the robot’s batteries? —Every two months.
#41136
A
How long
B
How soon
C
How often
D
How many
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My father has worked there ___________.
#41068
A
since five year
B
since 1990
C
for five years ago
D
five years
---______ are you buying so much food?---Because your uncle is coming for supper.
#40795
A
What
B
How
C
Where
D
Why