[填空题]Every exercise in the book (design)（）to build up your reasoning skills.

[填空题]Every exercise in the book (design)（　）to build up your reasoning skills.

[填空题]Every exercise in the book (design)（）to build up your reasoning skills.

[填空题]Every exercise in the book (design) （　） to build up your reasoning skills.

[填空题]Every exercise in the book (design)______ to build up your reasoning skills.

[填空题]Every exercise in the book (design) ______ to build up your reasoning skills.

[单项选择]
Exactly what do you do during a normal day How do you spend your time Paul T. Rankin very much wanted an answer to that question. To get it, he asked sixty-eight individuals to keep an accurate, detailed record of what they did every minute of their waking hours. When he consolidated (巩固) his findings, he discovered that the average individual spent 70 percent of his waking time doing one thing only--communication. That meant either reading, writing, speaking or listening.
Put that evidence alongside of the research findings uncovered by the Human Engineering Laboratories. In exploring aptitudes and careers involving, among other things, data from 30,000 vocabulary tests given yearly, they discovered that big incomes and big vocabularies go together. Vocabulary, more than any other factor yet known, predicts financial success.
And it all fits. Each word you add to your vocabulary m
A. To teach readers how to enlarge their vocabulary.
B. To explain the meaning of the CPD formula.
C. To introduce some research findings on communication.
D. To encourage readers to throw their dictionaries away.

[单项选择]

It is believed that climbing can build up the body. When it comes to some skills of climbing, mountain climbing will be the first choice for most people. Now many Americans are learning how to climb in gyms. Here, people can learn and practice on specially designed climbing walls. The climbing wall is vertical and has small holding places for hands and feet.
How do people climb the wall In order to climb, you need a pair of special shoes and a harness (保护带)around your chest to hold you. Ropes are tied to your harness, which hold you in place so that you don’t fall. There are small pieces of metal that protrude for you to stand on and hold on to. Sometimes it’s easy for one to see the new piece of metal, and sometimes it’s not. The most difficult section in climbing is probably to control your sense of fear. It’s normal for one to be afraid of falling, so it’s natural that you feel fear. But just remember when you move away from the wall, the
A. It is always easy to see pieces of metal in climbing.
B. It is impossible to build up body by climbing.
C. People are getting interested in climbing nowadays.
D. Many Americans learn to climb outdoors.