A good memory is a great ___ in learning a language.Everybody learns ...
A good memory is a great ___ in learning a language.Everybody learns his mother language when he is a small child.He hears the ___,remembers them and there he learns to speak.
A 1.a.help b.use
B 2.a.voice b.sounds c.word
这2个空为什么这样选?2项中词的差别在哪?