. Complete the sentences with the correct form of the verbs (present simple, present continuous, or present perfect).
1. _________ (you/ talk) about the upcoming journey? Can I join?
2. Recently, the United States___has altered_____ (alter) the whole of their immigration laws.
3. Either kangaroo or Sydney Opera House__________ (symbolize) Australia.
4. Look at the London Eye! The wheel_____is appearing_____ (appear) motionless, but it__________ (rotate) slowly.
