根据句意及首字母提示完成空格中所缺的单词。
1. His father often goes abroad and he can speak several foreign l_______.
2. China is one of the largest c_______ in the world.
3. My son likes eating hamburgers. He says they are very d_______.
4. Listen! S_______ is knocking at the door.
5. Will you please d_______what your English teacher looks like?
