43. He worked with deaf-mutes _______ Boston University. ( at , in , with , on)
44. He'll come _______ to pick you_______ ( on/ in , over/ on , in/ up , over/ up )
45. Mrs. Lien said you could reach her _______ 8 603 423. ( at, on, in, for)
46. English is spoken all ________ the world. (in, on, about , over)
47. The lighting fixture is ________ the dinner table . ( on, above, under, beneath)
48. He had to stay home ______ he was ill. ( because - so - and – until )