D) While 49. John doesnt believe in medicine, he has some remedies of his own A)standard D)conventional 50. Owing to competition among the ainines, travel expenses have been reduced considerably A)fierce Strained C)eager 51. They always give the vacant seats to comes first A)whoever B)whomever Whom 52. In Africa, educational costs are very low for those who are enough to get into A) ambitious Fortunate C)aggressive D)substantial 53. Professor Wang for his informative lectures, was warmly received by his Knowing Bknown c to be known Having known 54. Our manager is an important customer now and he will be back this afternoon. Calling in c)calling up D calling for 55. A fire engine must have priority as it usually has to deal with some kind of A) precaution Crisis 56. He said that the driver must have had an accident otherwise he A)would have arrived Must have arrived C) should arrive Dwould arriveD) While 49. John doesn’t believe in ________ medicine; he has some remedies of his own. A) standard B) regular C) routine D) conventional 50. Owing to ________ competition among the airlines, travel expenses have been reduced considerably. A) fierce B) strained C) eager D) critical 51. They always give the vacant seats to ________ comes first. A) whoever B) whomever C) who D) whom 52. In Africa, educational costs are very low for those who are ________ enough to get into universities. A) ambitious B) fortunate C) aggressive D) substantial 53. Professor Wang, ________ for his informative lectures, was warmly received by his students. A) knowing B) known C) to be known D) having known 54. Our manager is ________ an important customer now and he will be back this afternoon. A) calling on B) calling in C) calling up D) calling for 55. A fire engine must have priority as it usually has to deal with some kind of ________. A) precaution B) crisis C) emergency D) urgency 56. He said that the driver must have had an accident; otherwise he ________ by then. A) would have arrived B) must have arrived C) should arrive D) would arrive