21. He fell in the river but his friend saved him _______ drowning. A. from B. with C. on D. at 22. Richard succeeded _______ offending just about everybody in the room! A. with B. at C. in D. to 23. My brother always delights _______ telling me when I make a mistake. A. with B. in C. on D. to 24. This is something I am really serious _______ and want to take it all the way through. A. with B. at C. on D. about 25. Whooping cough is most dangerous _______ infants. A. with B. in C. for D. to 26. Is merely being present _______ the convention sufficient? A. with B. at C. on D. to 27. We need to find a compromise that is agreeable _______ both sides of the party. A. with B. at C. on D. to 28. Many students are worried _______ the coming exam. A. about B. on C. from D. to 29. She ought to be thoroughly ashamed _______ herself - talking to her mother like that! A. with B. at C. on D. of 30. Motor vehicles are prohibited _______ driving in the town centre. A. from B. for C. to D. at

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