【单选题】Task 2 Directions: This task is the same as Task 1. The 5 questions or unfinished statements are numbered 41 through 45. Human cloning(克隆) technology could be used to reverse heart attacks. Scientists...
A.
moving the damaged part of the heart
B.
replacing the old heart with a cloned one
C.
repairing the heart with cells cloned from healthy ones
D.
giving the patients injections of various medicines