21. The movie he saw last night ___ him of his school days in Japan 20 years ago.
A. remembered B. reminded C. remained D. told
22. There is no doubt ___ man will live in harmony with nature some day.
A. whether B. why C. which D. that
23. He lost his way in the forest, but he managed to get through it ___.
A. completely B. eventually C. quickly D. perfectly
24. Please tell me how the accident ___. I am still in the dark.
A. came across B. came on C. came down D. came about