I don’t think the experiment is ______ failure, because it has provided us with _____ valuable experience for our future tests.
In the past,ice ______food.
Enough______ to stop the forest______ since the 1980’s.
—Jim,have you finished reading Harry Potter and Half-Blood Prince?—No.I______ my father on the farm all day yesterday.
Many Chinese airline companies had intended to get much the business,but it______so bad.
—Are you glad that you came to Washington?—Yes indeed.I______going to New York or Boston,but I’ve never regretted my decision.