Dr. Johnson ate a big meal. He went to work afterward.

Câu hỏi: Mark the letter A, B, C or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.
Dr. Johnson ate a big meal. He went to work afterward.
A. After having a big meal, Dr. Johnson went to work.
B. Before having a big meal, Dr. Johnson went to work.
C. Dr. Johnson went to work for having a big meal.
D. Before having a big meal, Dr. Johnson had gone to work.