问题补充：
It rained heavily yesterday,, he didn turn up at the meeting.
A. As a result
B. As a result of
C. First of all
D. Instead of
答案：
(答案→)A. As a result
B. As a result of
C. First of all
D. Instead of
解析：as a result 意为:结果, as a result of意为:作为…的结果,由于….
