题目内容：

根据句意和汉语提示写出单词，完成句子。

1.He is one of the __________(先锋 ) of modern science.

2.Food safety ________________ (影响) our everyday life.

3.Reading after the tape can improve our________(发音).

4.The product of this company has reached the international ____________ (标准), so it sells well all over the world.

5.His parents died when he was very young, but love was never _________ (缺席的) from his childhood.