Because blood from different individuals may different in the type of antigen on the surface of the red cells and the type of antibody in the plasma, a dangerous reaction can occur between the donor and recipient in a blood transfusion.
(A) Because
(B) Different
(C) Can occur
(D) And
* Đáp án
B
* Hướng dẫn giải
Đáp án B => differ
may + V nguyên thể. Different là tính từ nên ta chuyển nó về dạng danh từ