QUES: Diameter of pin 45

correct the punctuation.

CORRECTED: Diameter of pin 4,5

QUES: 387 USD Standard group course Chinese Course 20 lessons per week 50 minutes per lesson

correct the punctuation.

CORRECTED: 387 USD Standard group course (Chinese Course - 20 lessons per week - 50 minutes per lesson)

QUES: The best bet is to check leaves and soil once a week

correct the punctuation.

CORRECTED:
The best bet is to check leaves and soil once a week.