She was a devoted teacher. She spent most of her time teaching and taking care of her students.
Giải chi tiết:
Đáp án là D. devoted = đeicate: cống hiến
Nghĩa các từ còn lại: polite: lịch sự; lazy: lười; honest: thật thà
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.