—__________ 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
推荐题目
My father has worked there ___________.
#41068
A
since five year
B
since 1990
C
for five years ago
D
five years
Simon has a house _______ a beautiful garden.
#41029
A
is
B
has
C
have
D
with
--_____ did he hiccup?--For one hour.
#41019
A
How long
B
How many
C
When
D
What time