Answer — Exercise Grammar 2
06 - Language focus 1·Cutting Edge Upper-Intermediate - Student's Book
Câu hỏi
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.
Câu trả lời
- 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