______ you come across some new words, don’t refer to your dictionary at once but guess their meanings according to the context. 

The two military exercises were similar __________ they were both intended to give a threat to a certain country.

----What a beautiful picture! ----It’s years ______ I painted a picture as beautiful as this one.

Some people waste food，________other people haven’t got enough to eat.

The museum will open in the spring with an exhibition and a viewing platform ___visitors can watch the big glasshouses being built.