Bicycling is good exercise; ____, it does not pollute the air. 
#23303
A
nevertheless
B
besides
C
otherwise
D
therefore
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I felt ______ tired, but he didn’t stop ______.
#24798
A
little, to read  
B
rather, studying
C
fairly, studying
D
few, to study
As he works in a remote area, he visits his parents only _________.
#23239
A
occasionally
B
anxiously
C
practically
D
urgently