The most important thing to keep in ______ mind when dealing with______ emergency is to stay calm.
You will succeed in the end ________ you give up halfway.
Not until the train pulled into the next station _______her suitcase gone.
The heavy fog in London made _______deep impression on us, which was sometimes so heavy that we lost ________sight of everything.
Thegovernmentshouldprotecttheoldvaluablebuildings____theyarenotin harmonywiththemodernonesnearby.
We used to see each other, but I haven’t heard from him since last year.