Answer — Exercise Grammar 2
06 - Language focus 1·Cutting Edge Upper-Intermediate - Student's Book
Question
Look at the timeline and the sentences in exercise 1b. Choose the correct answers in the rules below and find an example of each one.
Answer
- before - By 5000 BC, people in ancient Mesopotamia had invented the wheel ...
- 'before now' - Today ... we have landed on the moon ...
- before - within 30 years, we will have sent a manned mission to Mars ...
More exercises in 06 - Language focus 1