QUES: That is why it is important to get the mouth in good condition before cancer treatment begins

correct the punctuation.

CORRECTED: That is why it is important to get the mouth in good condition before cancer treatment begins.

QUES: TAC is for business people auditors and other users who need a versatile arithmetical calculator and who wish to calculate all the tax figures quickly For instance allocate costs between business and private expenditure check invoices review the tax effect coming from changes to tax rates examine price structures complete many different arithmetical calculations

correct the punctuation.

CORRECTED: TAC is for business people, auditors and other users who need a versatile arithmetical calculator and who wish to calculate all the tax figures quickly. For instance allocate costs between business and private expenditure; check invoices; review the tax effect coming from changes to tax rates; examine price structures; complete many different arithmetical calculations."

QUES: A cooperation agreement is signed between the European Union and the Republic of Korea

correct the punctuation.

CORRECTED:
A cooperation agreement is signed between the European Union and the Republic of Korea.