When asked how he liked his job, he said he was happy _____ he was．

(2013·江苏，28)In the global economy，a new drug for cancer，________it is discovered，will create many economic possibilities around the world.

_________, he knows a lot about space and satellite.

House prices vary from place to place and are usually high ____ there are famous schools.

It’s more than half a century _________ my grandfather joined the Party and became a servant to the people.