______ it is a challenge for me to finish the task in such t"ime, I enjoy it.

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______ it is a challenge for me to finish the task in such t"ime, I enjoy it.             [     ]
A. Because
B. Though
C. Unless
D. Until

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举一反三

Teenagers should practice their hobbies _______ they can.               [     ]
A. as many as
B. as much as
C. as more as
D. as more than

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____ you stay up late tonight, you won"t finish the work.   [     ]
A. Unless
B. Because
C. If
D. When

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Bob would give the money to charity ____ he got a million dollars.    [     ]
A. that
B. if
C. whether
D. until

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—____ you get home late after school?
—My mother will be angry with me.    [     ]
A. What if
B. How about
C. Even though
D. As if

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—What were you doing _________your mother was cleaning up the room?            —I was reading a book.[     ]
A. until
B. if
C. while
D. though

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