问题
选择题
Sally worked late in the evening to finish her report _______ her boss could read it first next morning.
A．so that
B．because
C．before
D．now that
答案
答案：A
本题的含义是萨莉在晚上工作的很晚才完成了她的报告，为了在第二天上午老板第一个能看到她的报告，表示目的可用so that表示为了的意思，故本题选A。
2NH3ΔH =－92 kJ/mol