It was not until dark ______ he found ___ he thought was the correct way to solve the problem.
46. With his own _____ Huang Jiguang, a fighting hero _____ the enemy's machine gun.
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 _____.