11. We wish to stress that shipment must be made within the prescribed time limit, as a further _______ will not be considered by our end - users.

A prolong B protract C extension D expansion 

12. With computer users linked to the Internet growing _____ every year, business is trying to cash in on the worldwide network. 
A at million B with a million C with one million D by millions 

13. We regret having to remind you that 30% of the freight is still ______. 
A owned B owning C outstanding D understanding 

14. ______ you fulfill the terms of the L/C, we will accept the drafts drawn under this credit. 
A Provided B To provide C In the case D Only if 

15. Kindly advise us of the steamers that call ______ your port every month. 
A at B on C in D for 

16. It should be _______ if you could immediately ______ what quantity you can supply us at present. 
A thankful, advise B appreciate, advise C appreciated, advise D appreciating, inform 

20. That helps to explain ______ businesses are setting up Net sites even though profits aren’t yet very big. 

A that B the reason for C why D why that