People think that Alexander Graham Bell inve...

Câu hỏi: People think that Alexander Graham Bell invented the telephone in 1915

A. It is thought that Alexander Graham Bell had invented the telephone in 1915

B. Alexander Graham Bell is thought to invent the telephone in 1915

C. The telephone thought to be invented by Alexander Graham Bell in 1915

D. Alexander Graham Bell is thought to have invented the telephone in 1915