---What’s that unpleasant noise?---Oh, the road before the main gate ______.
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.