7.No discount will be granted ____ you place an order for more than 1000 tons.
A.so
B.till
C.unless
D.nevertheless
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8.We look forward _____ your orders.
A.to
B.on
C.in
D.at
9.Our quotation ____30 tons of Shandong groundnuts is valid for 10 days.
A.to
B.after
C.if
D.for
10.We can supply this type of machine ____ very favorable terms.
A.for
B.to
C.against
D.on
11.The containers will leave our plant ____ rail.
A.by
B.in
C.for
D.on