V. Circle the appropriate word.
An old scientist whom everybody in England knows very (well, good) is travelling (on, by) train. The ticket-collector (is making, makes) his round. When he comes to the scientist and asks him for his ticket, (the, an) old man begins to look (at, for) it in his pockets, in his bag and suitcase, but (cannot, may not) find it anywhere.
"(There, it) doesn't matter," says the ticket-collector, who knows the scientist very (well, good). There's no hurry. I (may, can) come again (at, on) the next station". "Oh, but I (can, must) find it", says the old man (helplessly, helpless). "I want to know where I (go, am going)".
