Sorry to say it will be years _______ we really have classes here with only 25 students.
is reported in the newspaper is that seventeen climbers have been killed in the snow storm
Their carelessness ______ the failure. That is to say, the failure_____ their carelessness.
--- I think the waiter has forgotten us. We ______ here for an hour! --- I think you’re right. He probably thinks we have already ordered our food.
In front of our house ______ we used to swim.
He devoted most of his time to researching into space, believing his hard work would ______ sooner or later.