I have been living in the United States for twenty years ,but seldom _____ so lonely as now.
#84492
A
have I felt
B
I had felt
C
I have felt
D
had I felt
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 Not until he left home ________ the importance of his family.
#80238
A
he realised
B
did he realise
C
he did realise
D
realised he
At no time________the rules of the game.It was unfair to punish them.     (2013·辽宁,26)
#79682
A
they actually broke
B
do they actually break
C
did they actually break
D
they had actually broken