ManishKM1 wrote:
Perhaps the most significant medical breakthrough of the twenties, the real story behind the isolation of insulin was not revealed for over fifty years .
A)Perhaps the most significant medical breakthrough of the twenties, the real story behind the isolation of insulin was not revealed for over fifty years.
B)The real story behind the isolation of insulin was not revealed for over fifty years, even though it was perhaps the most significant medical breakthrough of the twenties.
C)Although the
...
.jpg)
