UNIT 7 – WORLD POPULATION CHOOSE THE WORD THAT HAS THE UNDERLINED PART...

14. Mary didn’t work hard enough, so she failed in her exams.

a. If Mary work hard enough, she wouldn’t fail in her exams.

b. Unless Mary worked hard enough, she would fail in her exams.

c. If Mary didn’t work hard enough, she would fail in her exams.

d. If Mary had worked hard enough, she wouldn’t have failed in her exams.