请认真阅读下面短文，从短文后各题所给的 A、B、C、D 四个选项中，选出最佳选项。
Li Ting, 15, from Shanghai, was preparing a talk
1 some Western festivals. She searched online for certain
2 and made PowerPoint presentations (展示).
Wu Qiang, her classmate, was doing his chemistry homework carefully. But he couldn't
3 the last problem even if he tried his best. So he took out his
4, opened a special app, and searched for the problem. Answers soon appeared on the
5 in several seconds.
Nowadays, many students like Li and Wu do homework online
6 the help of the internet. They search for information online and
7 through social media apps.
“It's convenient. You don't have to
8 your teacher to explain it to you face to face,” according to Wu. “You can also learn by seeing
9 others work them out. What's more, it improves students' abilities. And it's
10 true for new kinds of homework. I am quite
11 at searching for information online and using Microsoft Office.”
However, this trend
12 problems. Some lazy students just copy the answers online without thinking. Some even ask their classmates to do homework for them. And their teachers don't know the fact.
Anyway, knowing how to use the internet
13 important. The key is to have good self-control. When you come across a difficult problem, think about it by
14 first. Be sure to understand the reasons behind the answers after you've turned to the internet,
15 you won't make progress. If you are not sure about your self-control, ask your parents for help.
(
C
) 1. A. of
B. from
C. on
D. in
(
D
) 2. A. messages
B. news
C. plans
D. information
(
B
) 3. A. find out
B. work out
C. sell out
D. look out
(
C
) 4. A. watch
B. schoolbag
C. mobile phone
D. TV
(
A
) 5. A. screen
B. keyboard
C. mouse
D. main unit
(
D
) 6. A. without
B. on
C. under
D. with
(
B
) 7. A. look
B. discuss
C. accept
D. play
(
A
) 8. A. wait for
B. look for
C. call for
D. care for
(
C
) 9. A. when
B. what
C. how
D. why
(
B
)10. A. hardly
B. especially
C. simply
D. nearly
(
A
)11. A. skilled
B. poor
C. amazed
D. surprised
(
C
)12. A. passes
B. takes
C. causes
D. finds
(
C
)13. A. are
B. was
C. is
D. were
(
D
)14. A. himself
B. herself
C. myself
D. yourself
(
C
)15. A. and
B. but
C. or
D. so
