The Sanlu Milk Powder event is a clear indication that food safety is a big problem; nobody can __ _ all foods are secure to us, but we are sure that the situation is turning for the better.
28. Word came, as expected, ______ college entrance English exam will be reformed soon.
It is by no means clear the president can do to end the strike.
(年北京市西城区高三5月二模试题)31. A person who has never tasted bitter won’t know ______ sweet is.
It suddenly occurred to him he had left his keys in the office.
(年北京市西城区高三5月二模试题)23. It’s been discovered in the study ______ people are more relieved after forgiving others.