Question

Впишите правильный вариант, используя Past Simple или Present Perfect. Scientists still (not/find) ______ a cure for cancer.

Answer 1

Ответ Have not found

Answer 2

Scientists have not still found a cure for cancer.

Answer 3

Scientists still have not found a cure for cancer. The use of "have not found" in the Present Perfect tense is appropriate here because it indicates that the action of finding a cure for cancer is relevant to the present moment. The Present Perfect tense is often used to talk about actions that started in the past and continue up to the present, which is the case with the ongoing efforts of scientists to find a cure for cancer.