非药品不得在其包装、标签、说明书及有关宣传资料含有

A．预防人体疾病的内容

B．治疗人体疾病的内容

C．诊断人体疾病的内容

D．预防和诊断人体疾病的内容

E．预防、治疗、诊断人体疾病等有关内容

With his eyes ________ the work attentively, he didn’t know what was happening outside.

A．focusing on

B．focused on

C．fixing on

D．to fix on