You can only be sure of ____ you have at present; you cannot be sure of something ____ you might get in the future.
—Do you think the weather is good enough for an outing? —Yes, you couldn’t hope for _____at the time of the year.
After hearing the manager's stating their future plan, Mr.Brown came back home, ____.
—This book by Tony Garrison is of great use for our course. —But I think his latest one is _______ worth reading.
—Haven’t you seen the speed limit sign? Please drive _______. —Sorry, but I have to.
The more teenagers watch actors smoking in films, the more ______ they are to take up the habit of smoking themselves.