75. While having supper, we had an _______ (想不到) visitor. 　75. ____________

74. They hope to settle the problem _______ (和平地).　　　 74. ____________

73. ____________

73. Health _______(依靠) on good food, fresh air and enough sleep.

72. ____________

72. We had great difficulty _______(呼吸), for the air was thin.　

71. ____________

71. You must have your luggage ________(称重) at the airport.

70. ____________

70. We end a letter to someone we know with “yours ________(诚挚地)”.