Zhang Guorong’s singing career _________ about over 20 years. It was his ________ appearance at singing in public.
Every year, more than 70.000,000 sharks____for their fins.
The mountain is so high that its top snow all the year round.
Don’t throw away the waste paper. It needs so that it can be reused.
Something is wrong with my computer. It needs .
The classroom every day.