11.
（a） do you realize how expensive it is to go to that school？
（b） you know about the increase in school expenses, don't you？
（c） are you aware that you can go to that school at a minimal cost？
（d） how much did you pay for school fees？
12.
（a） how many things do you own？
（b） can you possibly do that？
（c） what did you pay for that？
（d） what could have made you do that？
13.
（a） i thought about getting a second workbook.
（b） i'm sorry i didn't borrow the workbook as well.
（c） i plan to finish the workbook tomorrow.
（d） i don't know why i need two workbooks.
14.
（a） it took forever to resolve the problem with the account.
（b） it was difficult to calculate the balance.
（c） this math work is difficult and time-consuming.
（d） it is hard to get help with these problems,.
15.
（a） i never seem to be able to finish a project.
（b） i prefer unfurnished places.
（c） i would like to leave early, but i can't .
（d） i must complete everything i begin.
16.
（a） i wasn't supposed to receive my bills in the mail.
（b） i don't want to file all those letters.
（c） i was expecting to find a pile of mail on my desk.
（d） i ought to catch up with my correspondence.
17.
（a） several bills were stapled together.
（b） we paid the bill in cash.
（c） the bill included an extra charge.
（d） the cashier put the bill onto a charge card.
18.
（a） i think the architecture department is in that building.
（b） i like modern buildings better than older ones.
（c） i don't like any new buildings.
（d） i don't think modern and older architecture go together.
19.
（a） warm weather is expected after the storm.
（b） forecasts have been wrong several times lately.
（c） weather conditions have improved since the last forecast.
（d） we are expecting bad weather to come soon.
20.
（a） i don't want to be a veterinarian anymore.
（b） do you think it's a good idea to become a veterinarian.
（c） i once met a very interesting veterinarian.
（d） will you become a veterinarian after college？
