题目内容
—_______ they _______ the book _______ to the library yet?
—Yes, they have.
A. Have; returned; / B. Have; returned; back
C. Did; return; / D. Did; return; back
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题目内容
—_______ they _______ the book _______ to the library yet?
—Yes, they have.
A. Have; returned; / B. Have; returned; back
C. Did; return; / D. Did; return; back