John’s quick action shows that （ ） knowledge of first aid can make （ ）real difference in saving a person’s life.
A.正确答案Ba; the
B.a; a
C./; the
D.the; a
John’s quick action shows that （ ） knowledge of first aid can make （ ）real difference in saving a person’s life.
John’s quick action shows that （ ） knowledge of first aid can make （ ）real difference in saving a person’s life.
A.正确答案Ba; the
B.a; a
C./; the
D.the; a
