一道财经英文的阅读填空题 急用,

一道财经英文的阅读填空题 急用,
Dear Sirs ,
Immediately on receipt of your telegram dated July 4 advising that the covering export license had been issued ,we opened telegraphically L/C No.6002 for $1500 in the customary manner .
Please see to it that shipment of this order is effected during this month ,since punctual shipment is one of important considerations in dealing with our market .
As called for in our L/C ,please mark all drums conspicuously with the shipping mark "xxx" and the word " PONISONOUS ".You compliance in this respect will do much to facilitate our taking delivery of the goods on arrival .
We should be glad if you could manage to arrange shipment by "Flying cloud " sailing on or about hte 20th ,and cable us your shipping advice immediately after the departure of the vessel .
1,the telegram advising export license was sent on （ ）
2,the number of letter of credit is（ ）
3,the shipping mark including（ ）
4,the seller should arrange shipment by（ ）
5,the buy prefer the shipping advice send by （ ）