2. Twenty common vegetables.

3, How many kinds of vegetables.

4. What are the 28 common vegetables.

1. greens, zucchini, cucumber, tomatoes, bitter melon, garlic table, garlic shoots, celery, oatmeal, spinach, eggplant, leeks, parsnips, carrots, potatoes, beans, onions, string beans, pumpkin, broccoli, winter squash, white radish.