Diego is a / an / the / - boy I was telling you about. He's a / an / the / - tutor at the sports camp we stayed at.
the, a
25
I've tried skiing a / an / the / - couple of times, but I don't think I'll ever be good enough to ski in a / an / the / - Alps.
a, the
25
Global heating / warming is an enormous international challange. It is thought to be the cause of a number of natural distasters / disastrous.
warming, disasters
25
Many iconic sites such as the Great Wall of China are struggling to cople from / with the effects of mass tourists / tourism.
with, tourism
25
Litter can cause severe damage / wrong to the environment and get / have a huge impact on wildlife, so remember / think twice before you drop an empty packet or bottle.
damage, have, think
25
I finally achieved / succeeded my goal of running a marathon in / on my third attempt.
achieved, on
25
To / At the first sign of bad weather, turn back. It's non / no use of putting yourself in danger.
At, no
25
deal / cope / disagree ...
with
15
congratulate / decide / concentrate ...
on
15
be scared / ashamed / afraid ...
of
15
ask / pay / prepare ...
for
15
complain / care / worry ...
about
15
The guide offered a / an / the / - bus or a / an / the / - walking tour. I'm glad we chose a / an / the / - walking tour. We saw so much.
a, a, the
25
A / An / The / - Swiss are known for producing some of a / an / the / - best chocolate.
