Lao Lin has been working in the countryside for a long time,
Lao Lin has been working in the countryside for a long time,
this hat has been in the window for a long time
Tom has been teaching in the vilage for ___(fair)a long time
( )Peter has been a secretary for a long time ,
there has been a picture on the wall for a long time.
It ___that he has been ill for a long time
He has been looking_____her pen for a long time
He has been __(wake) for a long time
there has been a picture on the wall for long time.
1.The existence of oil wells has been known for a long time.
for a long time he has been __ the causes of sleep
it has been the case for a long time that...这句话正确吗?