The problem was very difficult to handle.We worked it out,__________ .
#22212
A
too
B
yet
C
although
D
though
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Because he works far away from his parents, he visits them only_____.
#23069
A
independently
B
commonly
C
occasionally
D
frequently
He began to take political science ____ only when he leftschool.
#25080
A
strictly
B
truly
C
carefully
D
seriously