题目内容
8. — (be) they (laugh) ?
—Yes,they .
9. — What behind the sofa?
—There three cats. (be)
8. Are,laughing,are 9. is,are
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题目内容
8. — (be) they (laugh) ?
—Yes,they .
9. — What behind the sofa?
—There three cats. (be)
8. Are,laughing,are 9. is,are