Question

Jack _______yet，otherwisehe would have telephoned me．

1. A.
   mustn't have arrived
2. B.
   shouldn't have arrived
3. C.
   can'thave arrived
4. D.
   need not have arrived

Answer 1

C
本題中otherwise為連詞，意思是“否則，要不然”。would have telephoned表達(dá)虛擬，實(shí)際相反，即“他并沒有打電話”，所以空格處can't have arrived是對過去情形進(jìn)行語氣強(qiáng)烈的否定推測，意即“他不可能回來了”。