From the passage we cadraw the conclusiothat _________. ( ) ·couples who look alike calive longer ·most partners have beeproved to grow alike ·the influence betweepartners cabe quite strong ·happily-married couples are oftericher thaothers
答案是:单选题 ·leaving no trace for the testees ·copy ·had difficulty in picking out the partners ·the influence between partners can be quite strong