Google
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.
It has been estimated that if we intend to stay above the starvation level ___________ the food supply.
A. so we will have to double
B. and it must double
C. which it must be doubled
D. we must double
It has been estimated that if we intend to stay above the starvation level ___________ the food supply.
A. so we will have to double
B. and it must double
C. which it must be doubled
D. we must double
Câu sử dụng cấu trúc câu điều kiện loại 1
Đáp án D.