——I think the book is as interesting as it is instructive．—— It could never be____．It is well worth reading．

These experiences ______ me _____ the drug’s harmful effects. 

There is more than __________ rain this year,so some parts of the country have been flooded.

After two years’ research, we now have a ________ better understanding of the disease. 

------________ to many people’s expectation, the 2009 UN climate Change Conference didn’t achieve any specific goals. ------ Yes, it’s really disappointing.