1.aim to do和aim at doing应该都可以; B是aim to and (to)并列; 2.D的so as to与aim to语意重复, 一般不说aim to do sth as to do sth else; 找两个相关用法,参考一下, 141. (32450-!-item-!-188;#058&006160) The federal rules aimed at protecting human subjects of medical experiments were established to ensure that patients must be warned of potential risks and an independent panel would evaluate the experiment before it was conducted.
(A) must be warned of potential risks and an independent panel would (B) must be warned of potential risks and that an independent panel (C) are warned about potential risks and that an independent panel (D) will be warned about potential risks and an independent panel would (E) would be warned of potential risks and that an independent panel would
OG10-212 The Baldrick Manufacturing Company has for several years followed a policy aimed at decreasing operating costs and improving the efficiency of its distribution system.
(A) aimed at decreasing operating costs and improving (B) aimed at the decreasing of operating costs and to improve (C) aiming at the decreasing of operating costs and improving (D) the aim of which is the decreasing of operating costs and improving (E) with the aim to decrease operating costs and to improve
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