We_______ for the lost child everywhere, but we ______ it yet.
A.have been looking, have found B.have looked, haven't found C.have been looking, haven't found D.have looked, haven't been finding正确答案C
We_______ for the lost child everywhere, but we ______ it yet.
A.have been looking, have found B.have looked, haven't found C.have been looking, haven't found D.have looked, haven't been finding正确答案C