Chewing gum (口香糖) may be one of your favorite sweets. But did you know how it was ____?

The sweet was invented by American scientist Thomas Adams. However, he invented it completely __ .

It was 1869. Earlier that year, one of Adams' friends showed him an interesting kind of sap (树汁). His friend told him_____ people in Central America liked to chew (咀嚼) on it for fun. Hundreds of years passed, people didn't do that any longer. But Adams was interested in the sap. He wanted to use it to create some new ____ .

Adams, however, ________ to create the products he wanted. He felt bored and________ and happened to chew on the sap. _______ , the sap tasted great. Adams then added something else to the sap and started selling it. Later in 1869, he opened a factory to produce this delicious _______ .

In 1888, Adams gave a ________ to the invention: "chewing gum." The sweet can be got from selling machines at underground stations all over New York City. Over the years, new kinds have been _______ . Now, chewing gum is popular among many people. However, few people know this was all started by an American scientist from a mistake.

1.A.eaten B.polluted C.sold D.invented

2.A.in public B.by mistake C.in person D.by hand

3.A.ancient B.single C.famous D.sick

4.A.products B.records C.crops D.fruits

5.A.agreed B.preferred C.failed D.afforded

6.A.angry B.nervous C.lucky D.satisfied

7.A.Usually B.Surprisingly C.Slowly D.Clearly

8.A.dish B.meal C.drink D.treat

9.A.method B.name C.prize D.menu

10.A.divided B.stored C.developed D.repeated

通读下面短文,掌握其大意,然后在各题所给的四个选项(A,B,C,D)中选出一个最佳选项。

The summer before I went off to college, Mom stood me in her usual spot behind the ironing board(烫衣板) and said, "Pay attention. I'm going to teach you to iron."

Mom clearly explained her______for this lesson. I was going to be______and needed to learn this important______. Also, I would be meeting new people, and properly ironed clothes would help me make a good_______

"Learn to iron a_______," Mom said, "and you can iron anything."

But ironing shirts was not________work. It didn't make use of long muscles we used to throw a baseball, and it wasn't a________operation like ice-skating. Ironing was like driving a car on a street that has a stop sign every 10 feet. Moreover, an iron produced steam and it might carry _______. If you touched the wrong part of it, you'd get burnt. If you forgot to turn it off when you________, you might burn down the house.

As for the secret of the skill, Mom______ me to begin with the flat spaces outward, always pushing the iron forward into wrinkled(有褶皱的) parts. Collars(领子)had to be done right. Mom said they were close to your face, where everyone would________them.

Over the years, I've learned to iron shirts______, which gives me a sense of________. Whatever failures I suffer in my life, an ironed shirt tells me I am good at something.________, through ironing I've learned the method for solving even the most troublesome problems. "Make up wrinkles one at a time,"______Mom might have said, "and before long everything will get ironed out.”

1.A.rules B.reasons C.feelings D.ways

2.A.helpful B.confident C.powerful D.independent

3.A.skill B.solution C.problem D.lesson

4.A.suggestion B.impression C.instruction D.direction

5.A.skirt B.tie C.shirt D.trousers

6.A.useful B.easy C.special D.hard

7.A.direct B.single C.smooth D.strange

8.A.doubt B.pressure C.surprise D.danger

9.A.went away B.fell down C.jumped off D.looked up

10.A.taught B.chose C.forced D.sent

11.A.touch B.design C.see D.admire

12.A.skillful B.simply C.useful D.thankful

13.A.honesty B.freedom C.patience D.pride

14.A.Instead B.Besides C.anyway D.However

15.A.Though B.As C.When D.Since

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