It was suggested that Pedro studies the material more thoroughly before attempting

 Mark the letter A, B, C or D to indicate the correct answer to each of the following questions

We've got another set to ___ if this one doesn't work 

Read the following passage and mark the letter A B. C or D to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35 

HOW TRANSPORTATION AFFECTS OUR LIFE? 

Without transportation, our modern society could not (31) __. We would have no metal, no coal and no oil nor would we have any products made from these materials. (32) ___ we would have to spend most of our time raising food and food would be (33) ___ to the kinds that could grow in the climate and soil of our neighborhood. Transportation also affects our lives in other ways. Transportation can speed a doctor to the (34) ___ of a sick person, even if the patients' lives on an isolated farm. It can take police to the scene of a crime within a moment of being noticed. Transportation enables teams of athletes to compete in national and international sports contests. In time of (35) ___, transportation can rush aid to persons in areas stricken by floods, families and earthquakes. 

As soon as he arrived at the airport, he called home. 

The plant resembles grass in appearance. I couldn't tell them apart. 

She went to the bookshop ___. 

He was so engrossed in the book that he did not hear her footstep. 

High blood pressure results from either an increased output of blood from the heart and an increased resistance to its flow through tiny branches of the arteries. 

The word "callousness” could be best replaced by which of the following?