Choose the letter A, B, C or D to complete the passage below

Johnson __________ (6) a student. He’s 12 years old. He studies at Ba Dinh secondary school on Hoang Hoa Tham Street. He usually __________ (7) home for school at 6.30 a.m. He lives quite near the school, _________ (8) he usually walks to school with some of his friends. But today his father ___________ (9) him to school. He loves Literature and English. Today he has Physics, Chemistry and English. __________ (10) school, he often plays volleyball in the school field.

A. Before

B. After

C. During

D. When

Trong ống tiêu hoá ở người, dịch ruột được tiết ra khi nào

A. Khi thức ăn chạm lên niêm mạc dạ dày

B. Khi thức ăn chạm lên niêm mạc ruột

C. Khi thức ăn chạm vào lưỡi

D. Tất cả các phương án còn lại