问题补充：
that quite a lot of people were out of work.
A. So became serious the global economic crisis
B. So serious became the global economic crisis
C. So serious did the global economic crisis become
D. Serious the global economic crisis became so
答案：
A. So became serious the global economic crisis
B. So serious became the global economic crisis
(答案→)C. So serious did the global economic crisis become
D. Serious the global economic crisis became so
解析：本题考查倒装。so放在句首，用so + adj/adv + 主谓倒装。句意：全球经济危机如此的严重，以至于很多人失业。
