pat the verbs in brackets into the correct passive from.
3.The mystery of the moving stones in Death Valley ...........(not/explain) yet.
4.The details for the trip to the Cryptozoology Museum........(discuss)right now.
5.The film is about a scientist who believes that in the future,Earth .........(take over)by aliens.
6.James was waiting patiently while his takeaway meal ...... (prepare)
7.Tickets for the London Ghost tour should ........(book) in advance.

3) hasn't been explained 4) are being discussed 5) will be taken over6) was being prepared7) be booked