The old lady’s hand shook frequently.She explained to her doctor ______ this shaking had begun half a year before, and, ______ only because of this, she had been forced to give up her job.
#72537
A
when;how
B
how;when
C
how;how
D
why;why
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My mother was looking while I         the radio. 
#41312
A
listened to
B
have listened
C
was listening to
D
is listening to
 If it       the climate, I would stay here much longer. 
#66856
A
is not for
B
had not been for
C
were not for
D
would not be for
 Look, a group of students are playing the violin there, _______ their teacher as the conductor.
#66829
A
in front of them stand
B
in front of them stands
C
in front of whom standing
D
in front of whom stands