The last thirty years _____ the greatest number of laws stopping our rights and progress,until today we have reached a stage ____ we have almost no rights at all.[ ]

the prices of color TV sets down by 50%, the company had a very hard time.

I’ll never forget the holiday ______ we spent together.

October 1st in 2009 witnessed the grand National Day Military Parade, which has greatly China’s status in the world．

I can’t quite remember ______you started doing the work[ ]