单项选择题
______my neighbor’s kid with his coming exam，I spend an hour working with him every day.
单项选择题 He has fancy dreams about his life，and nothing ever quite______ his expectations.
单项选择题 Saffron returned to London to ______her acting career after four years of modeling.
单项选择题 By 2050 the world will have about 2 billion people aged over 60，three times _____today.
