Two–way (1)_____ depends on having a coding system that is understood by both sender and (2)_____ , and an agreed convention about signaling the beginning and end of the message.

For example, lowering the pitch of the voice may mean the end of a sentence, a sharp intake of breath may signal the desire to interrupt, catching the chairman’s eye may indicate the desire to speak in a formal setting like a debate, a clenched fist may indicate anger. When (5)_____ possible, more formal signals may be needed.

Secondly, there's too much testing and not enough learning. My fifteen–year–old daughter, for example, has just spent the last month or so (2)_____ for exams.

However, as the (2) snakes grow, they become more difficult to cafe and handle. To avoid dealing with the snakes, the owners irresponsibly
release them into the wild. 

Knowing such details about your best friend or loved one (3)_____ also tell you about the type of friend or partner he needs.

Noise effects can be (5)_____ by a number of techniques, for example, increasing the distance or blocking the path between the noise source and the recipient, reducing noise level at the source, and protecting recipients with earplugs or earmuffs

The Olympics are also an opportunity to invest in projects (5)_____ improve the city’s quality of life, such as new transportation systems

CRITICISM
It can take a long time to become successful in your chosen eld, no matter how talented you are. One thing you have to be aware of is that you will face criticism along the way. The world is full of people who would rather say something negative than positive. If you’ve made up your (1)_____ to achieve a certain goal, such as writing a novel, don’t let the negative criticism of others (2)_____ you from reaching your target, and let the constructive criticism have a positive (3)______ on your work. If someone says you’re totally in the lack of talent, ignore them. That’s negative criticism. If, (4)_____ , someone advises you to revise your work and gives you a good reason for doing so, you should consider their
suggestions carefully. There are many lm stars who were once out of work. There are many famous novelists (5)_____ made a complete mess of their rst novel – or who didn’t, but had to keep on approaching hundreds of publishers before they could get it published. Being successful does depend on luck, to a certain extent. But things are more likely to turn out well if you persevere and stay positive.

In addition to the challenge to be excellent, American schools have been facing novel problems. They must (1)________with an influx of immigrant children, many of whom speak little or no English. They must respond to demands that the curriculum reflect the various cultures of all children. Schools must make sure that students develop (2)________skills for the job market, and they must consider the needs of nontraditional students, such as teenage mothers. Schools are addressing these problems in ways that reflect the diversity of the US educational system. They are opening (3)________the traditional European-centered curriculum to embrace material from American, Asian, and other cultures. Schools are also teaching cognitive skills to the nearly 40 percent of American students who do not go on to higher education. In the (4)________of a recent report by the Commission on Achieving Necessary Skills, “A strong back, the willingness to work, and a high school diploma were once all that was necessary to (5)________a start in America.”
(4) ........