Cover of the textbook Gateway B1 - Workbook

The key answer of exercise 4

The key to exercise solutions in chapter 8 - Grammar in context for the textbook Gateway B1 - Workbook with authors David Spencer and Lynda Edwards from Macmillan Education

Question

Look at these important dates in history and write positive or negative sentences with the past perfect.

Answer

  1. By 1400 they hadn’t started to print books
  2. By 1805 they had made the first battery.
  3. By 1895 they had discovered X-rays.
  4. By 1900 they hadn’t flown for the first time.
  5. By 1910 they hadn’t discovered penicillin.
  6. By 1932 they had split the atom.
  7. By 1953 they had found the structure of DNA.
  8. By 1960 they hadn’t walked on the moon.