题目
A.on and before
B.on or before
C.before
D.by
第1题
A.on and before
B.on or before
C.before
D.by
第3题
第4题
第8题
A.The vendor shall deliver the goods to the vendee by June 15.
B.The goods shall be delivered to the vendee by June 15.
C.The vendor must deliver the goods to the vendee by June 15.
D.The goods must be delivered to the vendee by June 15.
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