My classmate Andrew went to Vancouver , Canada in 2005 , and_____since

George Orwell, _______ was Eric Arthur, wrote many political novels and essays. （北京，2004.26）

Susan, go and join your sister cleaning the yard.—Why ____ John is sitting there doing nothing.

You must be tired now. Why not _________ a rest

8He was so deep in thought, thinking of the problem ______ he knocked into the tree without noticing it