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(    )23. —What’s wrong with you?

—I_the    wall    while I was riding a bike.

A. knocked at    B. knocked into    C. knocked on    D.    knocked by

(    )22. Tommy_do    his homework_his teacher called his parents.

A. isn’t until    B. didn’t，until    C. isn't,till    D.    not,till

(    )21. —Did you go to Joe’s birthday party last night?

—No, I_.

A. didn’t invite    B. wasn’t inviting C. wasn’t invited    D. am not invited

(    )20. This apple is so_that    my    teeth    can’t stand it.

A. delicious    B.    salty    C.    crispy    D.    sour

(    )19. Only a few hundred of these animals_today.

A. stay    B.    remain    C.    keep    D.    still

(    )18. She tried many times to pass the exam, and_the end, she    succeeded.

A. by    B.    at    C.    in    D.    to

(    )17. He tried his best to do everything to make his young sister_again.

A. laughing    B.    to laugh    C.    laugh    D.    laughed

(    )16.—_

一By Thomas Alva Edison.

A. Who was the light bulb invented by?

B. When was the light bulb invented?

C. Why is the invention helpful?

D. What invention is the most helpful?

(    )15. After the rain，the water in the river_several    meters.

A. rose    B.    was risen    C.    raised    D.    was raised

(    )14. ~ Lucy is a friendly girl.

一Yes. Every time we meet her,she has a(n)_smile    on    her face.

A. ugly    B.    annoying    C.    dishonest    D.    pleasant