—Has Sam finished his homework today?—I have no idea. He ________ it this morning. A.did B
—HasSamfinishedhishomeworktoday?—Ihavenoidea.He________itthismorning.A.didB.hasdoneC....
—Has Sam finished his homework today?—I have no idea. He ________ it this morning. A.did B.has done C.was doing D.had done
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