She had a _____C_in which she saw her boyfriend coming with a bunch of red roses.

Though we have worked out the plan,the hardest part is putting it into       .

My colour TV set is only one year old and it is still under _____. 

 Although we hadn’t met for twenty years, I recognized him ____ I saw him.

One of the main __________ of the summit was “sustainable development”,or the question how we can continue developing the world without damaging the environment.