The passage tells us that gun-dogs（ ）.

• A、are easily trained

• B、carry things safely

• C、have no sharp teeth

• D、are the fastest runners 

Remaining Active

Our body is an amazing object. 26________ If you are inactive most of the time, your body will quickly become tired when it should be active. But if you are very active, your body will get used to the hard work, and the work will become easier for you to do.

Physical activity can help people remain active and stay healthy.27 ________ It also helps people sleep better. This is why active students don't complain about being tired. They have a good night's sleep and have the energy to study hard and have fun every day.

Physical activity also makes people look and feel good. Activity burns more calories（卡路里） than just sitting. 38________ In addition, regular exercise can make your muscles and bones stronger. There are many factors to look at when you select a new physical activity. The most important is to choose something you enjoy. If you like jumping rope, that is the activity you should do. 29________ In fact, two days of basketball, three days of swimming, and two days of bicycling can be more fun than jogging every day.

30 ________ Some skills will improve with practice while others may always be difficult for you. If you enjoy an activity, feel free to do it. No one cares whether you can do it well or not, and you don't need to care about it either. Whatever activity you choose, remain active. It can make you physically fit and healthy for life.

 

A: But you don't have to do the same thing every day.

B: Different activities need different skills.

C: You may prefer to participate in team activities.

D: It helps the body fight off illness.

E: The more you ask of it, the more it can do.

F: It is very important to keep a healthy weight. 

Life is Difficult

What makes life difficult is that the process of facing and solving problems is a painful one. Problems cause 31________ , anger, fear or despair. These are 32________feelings, often as painful as any kind of physical pain. And since life 33________an endless series of problems, it is 34________difficult and is full of pain as well as joy.

Yet it is in this process of 35________and solving problem that life has its meaning. Problems call forth our 36________and our wisdom. It is only because of problems that we grow 37________ and spiritually. When we want to encourage the 38________ of the human spirit, we encourage the human capacity to solve problems, just as in school we deliberately 39________ problems for our children to solve. It is through the pain of confronting and resolving that we learn. It is for this reason that 40________people learn not to fear but actually to welcome problems and actually to welcome the pain of problems.

 

A: meeting

B: courage

C: careful

D: growth

E: wise

F: take

G: sadness

H: set

I: poses

J: always

K: uncomfortable

L: mentally