________ you have seen things like thesebefore doesn’t matter

________sister I shared a room with when we were at college, has gone to work in Australia.

t the timely aid from different provinces, theaffected people in those areas ________ the difficulty.

Why do you look so puzzled?—Oh，I ________ over a most difficult maths problem

In the 1990’s,many well-educated young people went to Hainan Island____their jobs.[ ]