问题
选择题
—Oh, no. Our school football team lose again.
—They won't win _____ they practice more.[ ]
A. if
B. unless
C. when
D. because
答案
答案：B
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—Oh, no. Our school football team lose again.
—They won't win _____ they practice more.[ ]
A. if
B. unless
C. when
D. because
答案：B
