--- My dad bought me a new MP4 player, but I don’t know .
#40910
A
what to use
B
what to use it
C
how to use it
D
when to use it
推荐题目
—__________ 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
The two dresses are very nice. I can’t decide _________。
#40944
A
which one should I buy
B
which one to buy
C
which one I to buy
D
which I bought one
