— Chinese Premier Wen put great pressure on the Japanese side, otherwise the boat captain ___________． — As the saying goes, he who hasn’t seen the coffin （棺材） won’t cry．

So far no life has been found outside the earth, but while some scientists are actively searching for living things in outer space, others firmly believe there ____ . 

 I told Sally how to get here, but perhaps I ____ for her.

Every solid object ______ reflect a sound，varying according to the size and nature of the object． 

He ______ told you that because you have known the truth.