---When did you get to know each other ? ----It was in 2008___ we spent summer vocation together.
________I have to give a speech,I get extremely nervous before I start.
Mark needs to learn Chinese________his company is opening a branch in Beijing.
One can always manage to do more things,no matter________full one's schedule is in life.
She says that she'll have to close the shop ________ business improves.
In the global economy,a new drug for cancer,________it is discovered,will create many economic possibilities around the world.