___ Mr Morgan appears extremely cheerful in public, he is in fact leading a very unhappy life.

________ Mr. Morgan appears extremely cheerful in public, he is in fact leading a very unhappy life.

A．While　　　　　 B．When 　　　C．As　　　　　　　 D．Since

___ Mr Morgan appears extremely cheerful in public, he is in fact leading a very unhappy life.

1. A.
   While
2. B.
   When
3. C.
   As
4. D.
   Since

. ___ Mr Morgan appears extremely cheerful in public, he is in fact leading a very unhappy life.

A. While           B. When            C. As              D . Since

_     Mr. Morgan appears extremely cheerful in public, he is in fact leading a very unhappy life.

A. As                   B. Since                C. While               D. When