23.
(A) Because
(B) If
(C) Unless
(D) While

19. Mary: Do you want to go to the modern art exhibition in the museum? Lily: Very much. But, it’s crowded on weekends. Mary: Really? Lily: Yes, I went there last Saturday; it was packed. I could hardly see my favorite paintings close up. Mary: What a pity!____________ Lily: Good idea. Which day would be the best? (A) I prefer oil paintings to sculpture. (B) You are too busy to visit the museum. (C) Let’s go there sometime during the week. (D) You shouldn’t have packed your paintings.

20. Mother: Our daughter Lucy is pregnant. Father: That’s wonderful! She and Peter must be very happy. Mother: Yes, they are. But having a baby will cost them a lot. Father: That’s true.____________ Mother: Don’t worry. I’ll look after the baby when Lucy goes to work. Father: Oh, you’re the best grandma ever! (A) Is the baby about to have solid food? (B) Will the baby look like Lucy or Peter? (C) May I name the baby Belle if she’s a girl? (D) Do they earn enough to hire a babysitter?

21. Husband: I’m exhausted!____________ Wife: But it helps protect the environment. Husband: I know. Are there easier ways of doing it? It takes too much time to classify things. Plastic bottles in this bag, regular garbage in that one…. It drives me crazy. Wife: Why don’t you take a break? I’ll take care of it. (A) We have only one earth. (B) Clean air is what we need now. (C) I think recycling is just a waste of time. (D) Environmental protection is really important.

22. (A) above (B) at (C) over (D) up

24. (A) become (B) becomes (C) to become (D) will become

25. (A) encourage (B) encouraged (C) are encouraged (D) have encouraged

26. (A) ease (B) easy (C) easier (D) easily

27. (A) back (B) down (C) out (D) up

28. (A) Before (B) For (C) On (D) Since

29. (A) intense (B) effortless (C) identical (D) eager