四六级考试

【单选题】Let’s try to find out why getting fiber from whole foods is important for a healthy diet. Fiber has never been (67) you’d call a healthy nutrient. Suddenly, it’s a superstar: Manufacturers are (68) it to yogurt, juice, even (69) sweetener.
But as with many (70) , there’s an unseemly back story:Experts aren’t sure that these fiber-boosted foods are (71) trying.
Yes, you should eat lots of fiber. There’s no question that a diet (72) in high-fiber foods is a powerful lifesaver-it’s known to (73) the risk of heart disease and diabetes, and it helps (74) weight gain. Recent studies show a fiber-rich diet cuts the risk of breast cancer, too, and the (75) you’ll develop cancer of the small intestine.But the new foods might not (76) . That’s (77) many of them use "isolated" fiber—stuff that’s been (78) out of the foods that (79) contained it, says nutrition expert Tara Gidus, RD、Isolated fibers are (80) and don’t turn juice and yogurt (81) a delicious, grainy fooD、The downside: There’s (82) evidence that they protect (83) chronic diseases. So go (84) and try a glass of fiber-boosted grape juice, or stir some (85) into your coffee along with your artificial sweetener. Just don’t forget to also eat more whole grains, beans, and fruits and vegetable—they’re (86) lifesavers.
A、that B、what
C、which D、how
网考网参考答案：B
网考网解析：
[解析] 结构衔接题。本处意思是：纤维以前并不被认为是有营养的。空格处缺少表语从句的引导词，同时从句中谓语动词call后面缺少宾语，即在前面出现的fiber一词，故用，what来代替。 [避错指导] A)that引导表语从句时没有任何意义，不能替代任何成分；C)which引导表语从句时意为“哪一个”，不符合句意；D)how通常指“怎样”，而空格处要表示的是“什么”，不符合要求，故排除。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>