In the early days of baseball, the game was played by young men of means and social position.
Giải chi tiết:
Someone of means: ai đó người có của ăn của để; người giàu có => Đáp án là B.
Biogas can be utilized for electricity production, cooking, space heating, water heating and process heating.
Around 150 B.C. the Greek astronomer Hipparchus developed a system to classify stars according to brightness.