根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
“The chair is out to kill us,” says James Levine, a professor at the Mayo School of Medicine. Most of us have years of sitting experiences, considering ourselves quite good at it. _____But unfortunately ,a good deal of data suggests that we’re off our chairs to spend so much time on the vast variety of other seats where we’re fond of parking our bottoms .Here are some things that scientists have learned about the insidious (阴险的)nature of sitting.
Sitting position has gone wrong .
The human body is designed for walking. ______ But lately, not so much. In general, scientists believe ,Americans now sit for more than half of their walking hours .Sadly ,the sitting position exerts force on the body which can lead to a lot of trouble including poor circulation (血液循环) ，aches and pains.
_______
We’re not using much energy when we’re sitting still. ______ It is also just another way of saying “watch out for extra pounds .”It is mainly the chair that has caused the increase in obesity rates .A person with a desk job may burn 300 calories a day at work , but the same person might burn 2,300 calories a day in jobs that require considerable physical efforts. In other words , we need more walking to burn more calories.
Realize the damage.
Sitting at your desk and working hard for hours on end can increase your chances of getting a promotion. ______ When comparing people who spent the most time sitting with those who spent the least time sitting, researchers found more sitting increases the risks of death from all causes.

A．Make people become too fat.

B．We will say nature intends us to do it.

C．They ought to work out to build their bodies.

D．But it also brings people diseases or even early death

E. Certainly people have done that for thousands of years
F. We should be more patient and work longer than before.
G. That is just another way of saying“we are not burning many calories”.