GRAMMAR. Choose the item that best completes each sentence.
1. I wonder if they ... their destination by now.
A had reached
B reached
C will have reached
D will be reaching
2. If I'd known the hotel was going to be like this, I ... somewhere else.
A might book
B should have booked
C had booked
D would have booked
3. Next year, Edward ... to Antarctica on a scientific expedition!
A goes
B would go
C is going 
D will have gone
4. After moving to the countryside, she is ... more relaxed.
A very
B enough
C many
D much
5. We ... around the medieval castle by the guide.
A showed
B shown
C were shown
D had shown
6. Jane prefers to go on holiday by ... .
A her own
B alone
C herself
D self