David had prepared carefully for the chemistry exam, as he wanted to be sure of passing it

David had prepared carefully for the chemistry exam, as he wanted to be sure of passing it at the first .
A. experiment
B. intention
C. aim
D. attempt

A. experimentB. intentionC. aim(答案→)D. attempt解析：考查名词辨析。句意：大卫已经为化学考试做了精心准备，因为他想确定第一次尝试就通过。A实验；B意图，目的，打算；C目标，目的；D尝试，企图。“化学考试”不是一次实验，排除A；B、C两项在此与句意不符；at the first attempt初次尝试，故选D。

我明天再问问老师，叫他解释下这个问题

如以上回答内容为低俗、色情、不良、暴力、侵权、涉及违法等信息，可以点下面链接进行举报！

点此我要举报以上问答信息