50. "Without the sun, we couldn't live on the Earth." We can rewrite the sentence as "________"
(A) But for the sun, we couldn't live on the Earth.
(B) If it were not for the sun, we couldn't live on the Earth.
(C) We could haven't lived on the Earth if there is no sun.
(D) Were it not for the sun, we couldn't live on the Earth.
(E) If there had not been for the sun, we couldn't live on the Earth.