题目

阅读下列短文，从每题所给的 A、B、C和 D四个选项中，选出最佳选项。We sit too much，and researchersare discovering that even working out in a gym several times a week won't necessarily obviate seriousproblems if we're sitting for the rest of the time.From weight problems to poor blood glucose(葡萄糖) levels，even early death, the message is clear: we need to stop sitting forhours at a time. What to do？ Move more， say the experts.So we asked three fitnessinstructors for their preferred exercises that don't require equipment and canbe done throughout the day at解方程（组）（1）（2）．