【导读】
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1. [单选题]We have received your letter of September 12,()we are glad to know that you are interested in our electric heaters.
A. which
B. atwhich
C. fromwhich
D. inwhich
2. [单选题]As usual,we are going to insure against()for 110% of the invoice value.
A. order
B. All Risks and War Risk
C. you
D. shipment