Câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Babies often sleep up to 23 hours per day____________
A. that is in the first month of life
B. when the first month of life
C. during the first month of life
D. for it is the first month of life
Babies often sleep up to 23 hours per day____________
A. that is in the first month of life
B. when the first month of life
C. during the first month of life
D. for it is the first month of life
Là sự lựa chọn phù hợp nhất về mặt nghĩa; "trong suốt tháng đầu đời"
Đáp án C.