He often helps his mother do the housework ________
A. ,
B. :
C. ;
D. .
It was raining hard ________ they could not work in the fields.
A. ;
B. :
C. ,
D. !
I will go to Shanghai ________ Beijing and Shenzhen.
A. ;
B. ,
C. :
D. ?
I realize I need exercise; however ________ I’ll first think about it.
A. ;
B. !
C. .
D. ,
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