Faraz Rafi bhai, 4 of your answers were correct. Your answer # 2 (Colombo) and answer # 6 St. George's Park weren't
The correct answer for # 2 was Sharjah. Some of you might have recognized it otherwise if you look closely you will see Cricketers Benefit Fund Series (CBFS) on one of the stands. Actually you could only see Cricketers Benefit in that picture. But those who have closely followed Sharjah Cricket in 80's and 90's, they know about CBFS.
The correct answer for # 6 was The Wanderers Stadium, Johannesburg. If you have followed South Africa cricket you must have seen Castle Lager logo which is a major sponsor of South African cricket. I put the pavillion end picture hoping that people will be able to distinguish it from other South African grounds.