A.enclose，
B.enclose，you
C.enclose，to you
D.enclose  you，

A.on，of
B.at，with
C.in，for
D.with，at

A.of aposition，──
B.at aposition，──
C.in aposition，with
D.at aposition，with

A.As request
B.At request
C.As requested
D.At requested

A.which
B.at which
C.from which
D.in which

A.please
B.pleased
C.pleasure
D.in pleasure

A.had
B.have
C.has
D.having

A.with
B.to
C.for
D.than

A.developing
B.developed
C.develop
D.development

A.accepted
B.to accept
C.accepting
D.accept

A.aware
B.aware of
C.are aware of
D.are aware