We have made such great progress _________your help.

1. A.
   because
2. B.
   because of
3. C.
   thank to
4. D.
   as a result

We have made _______great progress in the medical field, but ______ progress we have made is not enough.

A. a; a             B. a; the                   C. /; the           D. /; /

We have made _______great progress in the medical field, but ______ progress we have made is not enough

1. A.
   a; a
2. B.
   a; the
3. C.
   /; the
4. D.
   /; /

We have made _______great progress in the medical field, but ______ progress we have made is not enough.