難度:★ 考點:介詞
	  1. Linda has bought a large house ________ a swimming pool.
	
	  A. with   B. in  C. on   D. from
	
	  2. I think it's not polite to laugh ______ others.
	
	  A. in                    B. at                        C. over
	
	  3. Practicing in groups is good ______ us to learn English.
	
	  A. at                        B. in                        C. for
	
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