Students can't surf the Internet during lessons ______ it is for that lesson.
A: unless
B: until
C: while
A: unless
B: until
C: while
A
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举一反三
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内容
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I’m afraid I can’t do the work well ________ to help me tomorrow. A: unless you will come B: unless you come C: until you will come D: until you should come
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They can surf the Internet in their dorm right now.
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- 3
All of you can master English within two years __________ you don’t want to. A: if B: until C: as D: unless
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______ I understand what you say, I can’t agree with you. A: If B: Unless C: While D: Since