Finally I turned the key in the lock and _______ the door open, with Dad still complaining (抱怨)

about a hurting knee or something.     [ ]

A. knocked  

B. forced    

C. pushed    

D. tried

黑海和地中海之间的海峡是 _____ ，苏伊士运河沟通了 _______海和     ______海。霍尔木兹海峡沟通了    ______湾和        _______海。