Don’t promise anything ______ you are one hundred percent sure.
There are some health problems that, when ____in time, can become bigger ones later on.
(2013·新课标Ⅱ卷)I got to the office earlier that day, the 7:30 train from Paddington.
They might just have a place ________ on the writing course— why don’t you give it a try?
The sunlight is white and blinding, _______ hard-edged shadows on the ground.
The engine just won't start. Something seems ________ wrong with it.