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he opened the window, a sparrow flew in. [ ]A. Though B. The moment C. If D. Unl

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he opened the window, a sparrow flew in. [ ]A. Though B. The moment C. If D. Unl

_____ he opened the window, a sparrow flew in. [     ]A. Though
B. The moment
C. If
D. Unless

试题答案

B