It’s nearly seven o’clock. Jack ________ be here at any moment.
Having an outdoor meal is always fun, but it can also be disappointing if ________.
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.