Tomorrow I have to go to the seminar, involving story. Provincial drugs 3 days
ผลลัพธ์ (ภาษาอังกฤษ) 2:
Tomorrow I have to go to a seminar about drug at three different days.

ผลลัพธ์ (ภาษาอังกฤษ) 3:
Tomorrow I must go to the seminar about drugs, the provincial 3 days.