____ has helped to protect the environment is worth praising.
32. All work and no play makes Jack a _____ boy. (prov.)
31. Graham was not a little _____ because he drank too much last night.
30. He is badly down these days. This sentence probably means _____.
29. What a delicious joke! This sentence means _____.
28. We have to set a definite date for the concert. The underlined word means _____.