. His suggestion will be _____ to us.
In order to go to a key university, I must______my study from now on.
The English teacher her students how to improve their comprehension skill since last week.
---- Sorry, I have to ______ now. It’s time for class.---- OK, I’ll call back later.
Before a problem can be solved, it must be obvious ______the problem itself is.
In the global economy, a new drug for cancer, it is discovered, will create many economic possibilities around the world.