One reason for the successes of Asian immigrants in the U. S. is that they have taken great______to educate their children.

【正确答案】 B

【答案解析】pains意为“努力，辛苦”，可与take搭配，have taken great pains意为“煞费苦心”。A项efforts意为“努力”； C项attempts意为“试图，尝试”；D项endeavors意为“努力”，与efforts同义。A、C、D项都不与动词take搭配。