Level A Level B Level C TOEFL Incorrect word TOEFL reading comprehension Synonym TOEFL

Lesson 50 - Subject/Verb Agreement

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  1. The use of vitamin supplements and herbs (be) ___ becoming increasingly popular among Americans.
  2. While many studies claim that vitamins and herbs can improve health, there (be) ___ a lot of controversy about their safety.
  3. The Food and Drug Administration (FDA) (do) ___ not regulate vitamins and herbs.
  4. Most experts (believe) ___ that herbal supplements are mild and somewhat harmless.
  5. Still, anyone who (take) ___ too much of a vitamin or herb could suffer negative side effects.
  6. For example, some medical problems (have) ___ been linked to overuse of ephedra, an herb taken by people to lose weight.
  7. Some research (suggest) ___ that Vitamin C may help prevent cancer.
  8. People who (take) ___ more than 1,000 miligrams of vitamin C daily may experience diarrhea or kidney stones.
  9. Advertisers say that the herb "kava kava" (reduce) ___ anxiety and insomnia.
  10. Using large amounts of kava kava (be) ___ not wise as muscle, eye or skin problems could result.
  11. The danger of long-term use of vitamins and herbs (be) ___ still unknown.
  12. There (be) ___ a lot of evidence that vitamin-rich foods are beneficial.
  13. However, whether the use of supplements (be) ___ helpful or not is still being debated.
  14. Most people (be) ___ able to get all the vitamins they need in the foods they eat.
  15. A daily diet that (contain) ___ foods from the 4 groups should supply all the nutrients a person needs.
  16. Eating 5 servings of fruits and vegetables daily (be) ___ said to provide all the essential vitamins we require.
  17. The best way to get the necessary vitamins and minerals (be) ___ naturally, through a healthy diet.
  18. Talking to your doctor before taking supplements (be) ___ advisable.


Grammar Easy Grammar Medium Grammar - Difficult
1->25 26->49 50->75 76->99 100->125 126->164
Ôn Tập Ngữ Pháp Phần 1 Ôn Tập Ngữ Pháp Phần 2