Mr. Green ___ my letter, otherwise he would have replied before now. (QE98-41)
A.must have received B.must have failed to receive C.must receive D.must fail to receive正确答案B
Mr. Green ___ my letter, otherwise he would have replied before now. (QE98-41)
A.must have received B.must have failed to receive C.must receive D.must fail to receive正确答案B