12. It is a difficult problem for high school students they can properly use the Internet.
A. what B. where
C. when D. whether
12. D考查主語從句的連接詞。句意：對于高中生來說，他們是否能正確地利用網絡是一個很難的問題。句子中it是形式主語，真正主語是whether引導的主語從句，根據句意選D項。
題目來源：2015全品語法快練高中英語新課標 > 訓練4從句綜合訓練
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16. Jenny has got it takes to be a good actress. In other words, she has the potential to become famous.
A. when B. what
C. that D. how
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9. ―Do you know they got to know each other?
―It was last year they both taught
English inChina.
A. when was it that ； when
B. when it was that; that
C. when it was that; when
D. when was it that; that
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2. The young couple, who returned my lost wallet, left I could ask
for their names.
A. while B. before
C. after D. since
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8. Lee MinHo, music and films are loved by many teenagers, was invited to perform in the 2014 Spring Festival Gala.
A. who B. whom
C. whose D. which
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17. children believe they can succeed, they will never become totally confident.
A. If B. Since
C. Once D. Unless
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2. I'll be out for some time. anything important happens, call me up immediately.
A. In case B. As if
C. Even though D. Now that
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19. I'll make some sandwiches, just we get hungry later.
A. even if B. as though
C. if only D. in case
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12. Hearing the dog barking fiercely, away
A. was fleeing the thief
B. fled the thief
C. the thief was fleeing
D. did the thief flee
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