Help me please:( i need to choose the correct verb.

3. No one in Europe (was, were) familiar with the taste of pumpkins,
blueberries, or maple syrup until explorers brought these foods
back from the Americas.
4. One American food that helped reduce the famine in Europe
(was, were) potatoes.
5. A field of potatoes (produce, produces) almost twice as much food
in about half as much growing time as the same field would if it
were planted with wheat.
6. News of tomatoes, sweet peppers, beans, and zucchini (was, were)
received warmly in Europe, and now these foods are the heart and
soul of southern Italian cooking,
7. At our school the Original American Chefs (is, are) a club that
prepares and serves such American Indian foods as baked sweet
potatoes and steamed corn pudding.

How does this quotation add credibility to freedman'sstatement that the immigrant voyages were not pleasant? read edward corsi's quotation from the book immigrantkids by russell freedman.edward corsi, who later became united statescommissioner of immigration, was a ten-year-old italianimmigrant when he sailed into new york harbor in 1907: the officers of the ship went striding up and downthe decks shouting orders and directions and drivingthe immigrants before them. scowling and gesturing,they pushed and pulled the passengers, herding usinto separate groups as though we were animals. afew moments later we came to our dock, and thelong journey was over.o it is from an actual immigrant who experienced roughtreatment by the ship's workers.it is from an actual sailor who herded the immigrants likeanimals on the decks.it is from an actual writer who wrote about a fictionalfamily immigrating to the united states.it is from an actual historian who studied the immigrationexperience at ellis island.