-May I trouble you with the question? -Sorry, but it is______ my knowledge.
38. You can’t imagine ______ when they heard the news ______ their team had won.
37. I would rather you ______ in my school, Mom.
36. How can you know whether you will succeed ______ you never try?
35. It was the fifth time that he ______ to such a meeting.
34. The villagers, ______ damaged by the flood, were given help by the International Red Cross.