The dog performed his duties（ ）.

• A、out of curiosity

• B、out of devotion

• C、to show his abilities

• D、to get something to eat 

We can infer from the passage that（ ）.

• A、Williams was hard on his dog

• B、Williams was a loving dog owner

• C、Prince was intelligent and faithful

• D、Prince was trustworthy but annoying

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.