I have no problem (爬)the mountain,which is not too high.
青少年应该被允许选择自己的爱好.
should be to choose their own hobbies.
I like a singer .(自己做曲的)(who)
I learn English .(听收音机)(listen)
The shoes ?(一定是她的)(be)
The soccer ball .(是她的)(belong)