-- When do you need to pay the balance? -- December 31. A. In B. By C. During D.
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-- When do you need to pay the balance?
-- ______ December 31.
A. In B. By C. During D. Within
试题答案
B

-- When do you need to pay the balance?
-- ______ December 31.
A. In B. By C. During D. Within
B