A.depends on
B.for condition that
C.on condition that
D.subject to

A.confidential
B.delicate
C.secret
D.sophisticated

A.go over
B.have read
C.refer to
D.check up

A.these
B.---
C.what
D.when

A.enclose；---
B.enclose；you
C.enclose；toyou
D.enclose you；---

A.clear
B.it is clear
C.that clear
D.it clear

A.Even
B.As
C.Much
D.Much as

A.we receive，not
B.we have received，never
C.did we receive，hardly
D.had we received，certainly

A.on
B.for
C.about
D.to

A.had agreed
B.already agreed
C.shall agree
D.should have agreed

A.on the high side
B.out of line with
C.are running high
D.be too high