—__________ 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
——Yes, it’s said that 80 per cent of fish in this river ________ live long.
#40922
A
doesn’t
B
don’t
C
isn’t
D
aren’t
--- What do you think of the fish? --- It looks __________,but tastes__________.
#40767
A
good; bad
B
well; bad
C
well; badly
D
good; badly
Can you tell me ________ the problem of stress?
#40761
A
what I should deal with
B
how I should do with
C
what to deal with
D
how to deal with