71.   Drugs prescribed by doctors can be extremely hazardous if used in the wrong way.

72.   During the Middle Ages, living pictures of biblical stories were used in churches to educate the illiterate masses.

73.   Early subjects of time study were the locomotive tires Taylor had used in his earliest metal-cutting experiments.

74.   Economic sanctions will be used only in the last resort.

75.   Economic systems and the concepts used in economics can seem as complicated as political systems and the concepts used in political science.

76.   Even if successful, equipment used in the experiments would have to be miniaturized before being used in space flight.

77.   Everywhere else it is used in the sense of legal rules embodied in one document.

78.   Explanation Both baking powder and baking soda are used in baking cakes and some breads.

79.   Fennel can be used in fresh or even tea bag form.

80.   For many who use e-mail in their businesses, the busy signals are more than an inconvenience.