—The light is still on. He is studying. Does he always work so late?

—Yes. Who else can _______ he does?

A. be as hardworking as　　　　 B. be working harder than

C. study harder than　　　　　　 D. work as hard as

—The light is still on. He is studying. Does he always work so late?

—Yes. Who else can _______ he does?

A. be as hardworking as　

B. be working harder than

C. study harder than　

D. work as hard as