QUES: Peng left the Nationalist Army and became a Communist in 1928

correct the punctuation.

CORRECTED: Peng left the Nationalist Army and became a Communist in 1928.

QUES: WiFi Sense is also available on Windows 10

correct the punctuation.

CORRECTED: Wi-Fi Sense is also available on Windows 10.

QUES: Winter is the best time to have the mower maintained professionally oil change air filter and spark plug replacement but also sharpening of blades are then often offered more cheaply by lawn mower dealers or specialist companies

correct the punctuation.

CORRECTED:
Winter is the best time to have the mower maintained professionally: oil change, air filter and spark plug replacement but also sharpening of blades are then often offered more cheaply by lawn mower dealers or specialist companies.