问题

(湖南省怀化市2014年高三第二次模拟考试)35. So mysteriously ______ missing that many puzzles wait to be solved.
A:did Flight MH370 go
B:Flight MH370 went
C:does Flight MH370 go
D:had Flight MH370 gone
B:Flight MH370 went
C:does Flight MH370 go
D:had Flight MH370 gone
正确答案是: