Sharks have been on earth for ____(thousand) of years.填什么?
Man _______ on the earth for thousands of years .
They have been working ____ a teacher for 10 years.
He has ____ ____ America for 3 years.填 been to 还是 been in
选择合适的单词填空Two hundred thousand yuan have been ____ for the ch
they have been away for six years如何改为同义句 six years ____ ____
For hundreds Of years,scientists have been trying to answer
I have been in Shanghai for five years.同义句转换____ ____ five y
英语翻译Volcanoes have been erupting on the earth for millions o
翻译16.Man has existed on the earth for thousands of years.
Man _______ on the earth for thousands of years . 选项: a、is e
英语翻译Insects lived on earth for millions of years.They lived
为什么My parents ( ) Beijing for ten years中间只能填have been in而不能填