Failure can be positive contribution to your life________you learn how to use i

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Failure can be positive contribution to your life________you learn  how to use it.[     ]
A．since
B．unless
C．even if
D．once

答案

举一反三

"What you can"t imagine is how terrible life will be________you get addicted to drugs,  " our teachers
often warn us. [     ]
A. in that
B. even if
C. until
D. once

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We didn"t see Tom run in the race. That"s _____ he hasn"t recovered from his knee injury.[     ]
A. because
B. that
C. why
D. what

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________you want to improve your oral English, you should start speaking English every day. [     ]
A. So long as
B. In order that
C. Even though
D. Now that

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— When shall we go to have a picnic?
— Not________the weather begins to pick up. [     ]
A. since
B. until
C. unless
D. while

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_____ it"s a little bit hard for some of us to imitate the standard English accent, we still communicate with
foreigners very well.[     ]
A. As if
B. Even if
C. Now that
D. As long as

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