Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions. 18. After I ........... the homework this morning, I hung out with my friends A. finished B. had finished C. finishes D. could finished 19. He will take that dog out for a walk as soon as he .............. the assignments. A. finished B. had finished C. finishes D. could finished 20. Nam .............. at RMIT school these days. A. has studied B. is studying C. studied D. studies 21. The man got out of the car, ........ around to the back and ............ the boot. A. walked... openned C. walked... opened B. walks.... opens D. walked... opened 22. The train .................... Hanoi for Hue at 4 am tomorrow. A. has left B. leaves C. will left D. is leave 23. They .............. a meeting at my school tomorrow morning. A. will be held B. will hold C. will held D. holds 24. He is the smartest boy I ‘ve .................. A. met ever B. ever met C. ever meet D. meet 25. My sister has worked as a doctor ............ she graduated the University. A. when B. while C. since D. why