改写句子 按括号中的要求完成句子，每个空格填一个单词。
There is a big lake in the park.  (改为否定句)
There _____________ ______________ a big lake in the park.
He has lived in this village for 80 years. (就句子画线部分提问)
_____________ _____________ he lived for 80 years.?
The problem is very difficult. I can’t work it out.  (改写句子,句意不变)
The problem is _____________difficult for me ____________work out.
“What are you doing ?” My mother asked me. (改写句子,句意不变)
My mother asked me ____________I ____________ doing .
We shouldn’t drop litter anywhere when we visit the interesting places. (改写句子,句意不变)
Litter shouldn’t _____________ ___________ anywhere when we visit the interesting places.