根据句意用括号中单词的适当形式填空，使句子的意思完整、正确。

【1】Please speak loudly. I can’t hear you______ (clear) , Lin Tao?

【2】The______ (speak) standing on the playground are all from the USA.

【3】More and more people enjoy the______ (nature) food now.

【4】Here are some_______ (address). But only one of them is right.

【5】Can you understand the______ (important) of learning English well?