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

问题补充：

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

答案：

A. experiment

B. intention

C. aim

(答案→)D. attempt

解析：句意：大卫曾为化学的考试，认真地准备，因为他想确定第一次尝试就能通过考试。experiment 实验；intention意向，意图，目的；打算；aim 目标；attempt尝试，努力。故选D。

考点: 考查名词词义辨析的用法。