41.

    （a） pink.

    （b） green.

    （c） maroon.

    （d） white.

    42.

    （a） to paint the trash cars.

    （b） to pick up and sort the trash.

    （c） to pick up and deliver the trash.

    （d） to work in the recycling center.来源：www.examda.com

    43.

    （a）to ask for finding a job.

    （b） to find out what he's doing during the summer.

    （c） to ask him to give her some advice.

    （d） to invite him to go shopping with her later.

    44.

    （a） it'd give her a chance to make a lot of money immediately.

    （b） she could stay at a hotel at a discount.

    （c） she might get a good job later.

    （d） she might be able to get course credits for her work.

    45.

    （a） she'll have to work long hours.

    （b） she'll have to work at the hotel during the school year.

    （c） her rent will be expensive.

    （d） it doesn't pay very well.

    46.

    （a） make extra money while taking classes.

    （b） work in the clothing store.

    （c） visit the hotel.

    （d） continue her job search for while.

    47.

    （a） a recipe for a soft drink.

    （b） the medicinal effects of cola.

    （c） the history of cola.

    （d） soft-drink production.

    48.

    （a） as a soft drink.

    （b） as a medicine.

    （c） as a flavored hard candy.

    （d） asa cooking oil.

    49.

    （a） he sold cola to doctors.

    （b） he was a drugstore clerk.

    （c） he developed the cola syrup.

    （d） he suffered from severe headaches.

    50.

    （a） by mixing it with special oils.

    （b） by heating it.

    （c） by combining it with different flavors.

    （d） by adding soda water.