QUES: The first illness day is not paid

correct the punctuation.

CORRECTED: The first illness day is not paid.

QUES: Some WAD file extension formats can be opened in binary format only

correct the punctuation.

CORRECTED: * Some WAD file extension formats can be opened in binary format only.

QUES: Looking which airport for Chinchn

correct the punctuation.

CORRECTED:
Looking which airport for Chinchon?