The boy is ____ young to join the army (参军). [ ]
The boy said ________ couldn’t he work out the problem but his teacher didn’t know how to do it.
Let’s go to Hainan on vacation. -Oh, no. I have to Hainan several times.
We sell these oranges_____a good price.[ ]
This is my good friend(朋友).—________ name is Tony.