You can’t imagine the difficulty he _____ onto the cliff and saving the boy in trouble. 

Joseph _____ to evening classes since last month, but he still can’t say “What’s your name?” in Russian.

 I guess Tom won’t keep on asking me the time from now on, as he has had his watch ______.

— Have you watched the film “Avatar”? — Not yet. But I       the film is worth watching. 

---Have you read any novels written by the famous writer Mo Yan? --- Yes, of course. I ______ several of his works when I was studying abroad.