It was after he had read the requirements _______ Mr. Black realized the task was too difficult to be finished.
22. One learns a language by making mistakes and ______ them.
35. Although they met with difficulties, I hear that they’ve succeeded _______.
32. ---Why didn’t you buy that T-shirt? ---I dislike the pattern. ______, the colour didn’t suit me.
29. ______ that I made a mistake, I made an apology ______ him.
28. ______ on the top of the tower, and you can see the whole city.