Thank you very much for all you've done for me,which is ________great value to me.
When I came ________ with the teenager hidden in the cave, I was surprised to find him ________ covered with dust.
You can never imagine what great difficulty I had ________ his parents.
One of the engines of the plane was out of order and the bad weather ________ the difficulty.
--- Oh, it’s you! I ________ you.--- I’ve just had my hair cut and I am wearing new glasses.
He made a mistake, so he told a lie to avoid ______.