. He was told that it would be at least three more months __________ he could recover and return to work. 
#72519
A
when
B
before
C
since
D
that
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They promised to develop a software package by the end of this year, ________ they might have.
#67763
A
however difficult
B
how difficult
C
whatever difficulty
D
what difficulty
No matter ______ the CRH accident in Wenzhou, it had and will have much warning significance.
#67709
A
how the investigators said caused
B
what the investigators said caused
C
why the investigators said caused
D
the investigators said how caused