請幫忙找出句子中的錯誤

1. Major sources of noise pollution include automobiles and other vehicles , industrial plants, and heavy construction equipment.
(解答: 當設備工具時equipment不可數所以字尾要去掉字尾s; vehicles拼錯字 )

2. When hay fever first occured, it was often mistaken for a summer cold.
(解答: first 表示 “首度” 所以要用過去時態 occurred, was
It was often mistaken (被誤認為…所以要用過去分詞表示被動)

3.The emphasis on such team sports as the football games and basketball games has become stronger in this century than it was in the last.
(解答: 主詞是名詞所以改用 emphasis; 在此汎指兩種球類活動皆是可數名詞所以改成複數)

請問第一題有沒有打錯?

請問第三題的emphasize還有最後的in the last是否有打錯?