You can only be sure of __________ you have at present; you cannot be sure of something __________ you might get in the future.
These plastic flowers look so _____ that many people think they are real.
.It was so dark in the cinema that I could hardly ____ my friend.
When I took his temperature, it was two degrees above _____.
Don’t be _______ by products promising to make you lose your weight quickly.
What makes the space shuttle _____ is that it takes off like a rocket but lands like an airplane.