Children who watch a great deal of television {and their families have a history of near-sightedness }will probably require glasses sooner than their peers who are not predisposed to myopia in these ways. A and their families have a history of near-sightedness B whose families have a history of near-sightedness B C and a history of near-sightedness runs in the family 答案是B, 提问:B应该是and whose吧,少了个and?
同大全675 675. Studies show that young people with higher-than-average blood pressure and their families have a history of high blood pressure are more likely than others to develop a severe form of the condition. (A) and their families have a history of high blood pressure (B) whose families have a history of high blood pressure (C) and a history of high blood pressure runs in the family (D) whose families have a history of high blood pressure running in them (E) with a history of high blood pressure running in their family 答案 B
all the choices are wrong, but the others are more wrong, so we can only choose the best ones, Bs in the above examples, which are also wrong. This is complied with ETS' principles os SC.