On Monday, World Health Organization (WHO) stated a plan to rid the world's food supply of trans fats（反式脂肪）. These unhealthy things have been related to many illnesses. WHO is a United Nations organization {#blank#}1{#/blank#} works to improve good health around the world. Its plan is called REPLACE. The step-by-step guide is designed {#blank#}2{#/blank#} (help) world governments remove trans fats {#blank#}3{#/blank#} their foods within the next five years.

    Trans fats {#blank#}4{#/blank#} (use) in baked goods and fried foods. Food companies use trans fats to keep foods for longer periods of time. But the things can be deadly. WHO says that{#blank#}5{#/blank#}(eat) foods with trans fats results in more than 500,000 deaths from heart disease every year. Trans fats are a harmful substances and can be removed {#blank#}6{#/blank#} (easy) without major cost and without any effect on the quality of the foods.

    Denmark {#blank#}7{#/blank#} (be) the first country to ban trans fats 15 years ago. The United States and 40 other {#blank#}8{#/blank#} (country) soon followed. “Why should our children have such {#blank#}9{#/blank#} unsafe substance in their foods?” Dr. Tedros Ghebreyesus asked in an interview. He is WHO's director-general. He said that the plan could “make food systems much {#blank#}10{#/blank#} (healthy) for future generations.”

    NASA has a new job listing, and it's no joke. The US space agency is looking for a "joker" to join their {#blank#}1{#/blank#} (plan) mission to Mars.

A mission to Mars is no laughing matter. {#blank#}2{#/blank#} is known that Mars is 225 million kilometers away from Earth. A trip there would take around eight months in a small spacecraft. "When you're living with others in a confined (封闭的) space for a long period of time, such as on a mission to Mars, problems are likely {#blank#}3{#/blank#} (happen)" Jeffrey Johnson, a scientist at the University of Florida, {#blank#}4{#/blank#} (say) to the Guardian. This is probably {#blank#}5{#/blank#} NASA wants an astronaut with a sense of humor. "These are people that have the {#blank#}6{#/blank#} (able) to pull everyone together." Johnson said.

    In {#blank#}7{#/blank#} (stress) situations, perhaps humor is a way to know we aren't alone. We can share our stress by {#blank#}8{#/blank#} (laugh) together. Then we can focus on our jobs instead of just worrying.

But if you're hoping that your favorite TV comedian will fly to Mars, that {#blank#}9{#/blank#} (possible) won't happen. "Being funny won't be enough to land somebody the job," Johnson said, "They also need to be an excellent scientist and engineer." Besides, it's required that they {#blank#}10{#/blank#} (be) in top physical condition.