@izalex,
												My version:
1.You 
must not worry about me. Anyway you 
have to walk miles to find a telephone that works
2. A large reception 
was organized for the professor before he arrived
3. We 
will go to the beach tomorrow unless it
 rains
4. 
What an amazing sight the Pyramids are!.
5. Sarah replied that she
 did not like it at first, but she really 
has enjoyed it then.
6. We hadnt booked
  an accomodation before we went, and we had  
an awful time finding 
a room to stay 
I am not sure about tenses, mybe someone can help.