Bài tập Tìm sửa lỗi sai có đáp án Phần 3

If the doctors could successfully develop to the vaccine, a lot of people would be saved

29/100

If the doctors could successfully develop to the vaccine, a lot of people would be saved.

          A                                        B                            C                     D

0/3000 ký tự
Giải thích

Đáp án đúng là: B