13. A) A financial burden.                  C) A real nuisance.

   B) A good companion                  D) A well-trained pet.

14. A) The errors will be corrected soon.      C) The computing system is too complex.

   B) The woman was mistaken herself.      D) He has called the woman several times.

15. A) He needs help to retrieve his files.      C) He needs some time to polish his paper.

   B) He has to type his paper once more.     D) He will be away for a two-week conference.

16. A) They might have to change their plan.

   B) He has got everything set for their trip.

   C) He has a heavier workload than the woman.

   D) They could stay in the mountains until June 8.

17. A) They have wait a month to apply for a student loan.

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