Not a ______ has been found so far that can help the police find the criminal.A.factB.clue

That young man has made so much noise that he______not have been allowed to attend the con

The association between ______ has not yet been found in Australia.A．ozone levels and hosp

It has been rainy these days. It is not______of a day for a walk after supper.A．muchB．so m

_____caused the accident has not yet been found.A．WhichB．WhicheverC．WhatD．Whatever

______, he would not have been released from hospital so quickly.A．Hadn"t he been taken go

It has been found that even people insensitive to a certain smell______can suddenly become