Seldom________as lonely as now though I have been living in Fuzhou for more than 20 years. 
#84479
A
have I felt
B
I had felt
C
I have felt
D
had I felt
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Only when I left for America ____________ how much I missed my parents.
#83247
A
I realized
B
did I realize
C
I had realized
D
had I realized
 No sooner ________ down on bed ________ the telephone rang.
#79584
A
had he lain; than
B
had he lied; when
C
did he lie; than
D
had he laid; before
Small sailboats can easily turn over in the water ________.
#82117
A
if not managed carefully
B
if are not managed carefully
C
unless not managed carefully
D
unless are not managed carefully