We spent the entire day looking for a new hotel.
Giải chi tiết:
Đáp án là C. the entire day = all day long: cả ngày
Around 150 B.C. the Greek astronomer Hipparchus developed a system to classify stars according to brightness.
Biogas can be utilized for electricity production, cooking, space heating, water heating and process heating.
Population growth rates vary among regions and even among countries within the same region.