1. Tom is __________ European and he is ___________ honest boy.
A. a, an B. an, a C. an, an D. a, a
答：A。用在辅音前，an用在元音之前。如：a useful book, a one-year-old child, an hour, an honest man.
2. Alexander Graham Bell invented _______ telephone in 1876.
A. / B. a C. the D. one
答：C。定冠词the接可数名词单数表示整个类属。如想表达“虎面临着灭绝的危险”不能说A tiger is in danger of dying out, 而应说 The tiger is in danger of dying out。
