21.As earlier discrepancies were accepted by the L/C applicant ____ writing, we request you to effect payment without delay.
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22.We trust you will look ____ the matter without delay upon receiving the substantiating data concerning the damage.
A.on
B.upon
C.in
D.into
23.To avoid possible dispute ____ quality, both sides should describe the goods clearly.
A.on
B.in
C.of
D.at
24.Subject____satisfactoryreferences,wewouldbegladtoconsideropenaccountterms.
A. of
B. on
C. to
D. in
25.____ an order for over 500 pieces we would allow a special discount of 5%.
A.In case
B.In case that
C.In the case
D.In case of