Jason has been preparing carefully for his English examination so that he could be sure of

问题补充：

Jason has been preparing carefully for his English examination so that he could be sure of passing it at his first .

A. purpose

B. desire

C. attempt

D. intention

答案：

A. purpose

B. desire

(答案→)C. attempt

D. intention

解析：purpose目的，意图；desire愿望；attempt尝试做某事；intention意图，意向，目的。题意：他已经仔细准备了英语考试以确保一次通过考试。