Besides Tom, ________ Crosettes have two other sons, __________ of whom are all interested in making model planes.
47. He earned scarcely enough to keep _____ together.
48. _____ and butter ____ the daily food in west countries.
49. ____ and friends should be few but good. (prov.)
50. John is on the bottle again. This sentence probably means _____.
51. --- Who is at the _____ of all this trouble. --- I don’t know.