1 ex
1 ride 2 fly 3 sailed 4 cycled
2ex
1 true 2 desert 3 source 4 clear 5 highlight
3ex
a)1 d 2 e c 3 4 a 5 f 6 b
b) 1 river cruise 2 ancient ruins 3 double-decker bus 4 city skyline
4ex
1 took 2 made 3 swam 4 did 5 rode 6 saw 7 climbed 8 tried
5ex
1 has visited 2 has left 3 have stayed 4 have travelled 5 has promised 6 have decided 7 has chosen 8 has been 9 have brought
6 ex
1 has gone 2 have been 3 has gone 4 has been 5 has gone 6 has gone 7 have been 8 have been