It was on July 1, 2006 ___ Qinghai-Tibet railway began operation, ____ is a symbolic project in China’s West Development Strategy.
#85284
A
when; that
B
that; when
C
which; when
D
that; which
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It was ______ back home after the experiment. 
#85256
A
not until midnight did he go
B
until midnight that he didn’t go
C
not until midnight that he went
D
until midnight when he didn’t go
 I just wonder          that makes him so excited.
#85101
A
why it does
B
what he does
C
how it is
D
what it is