What can be the best title for the text?

(单选题)Where is this passage most probably taken from? (单选题)How much should a couple pay if they join the gym today? (单选题)What can be inferred from the passage? (单选题)Many Americans fail to lose weight probably because ______. (单选题)（ ） (单选题)You cannot go outside since it is too late; _____ it is rain (单选题)It will be many years ______ the doctors and medical scienti (单选题)______ to the polluted air is dangerous for our health. (单选题)At present, there are many instances ______ the governments (单选题)The auto-company succeeded in developing a new type of new e