--Why are the windows so dirty?--Because we_________them for a long time.A. have cleaned B. haven't cleaned C. didn't clean
“Is anyoneat home?” “No.Come in, please.”A B C D
Mr Yang is a doctor. He works ____ .
My uncle is a ____ . He does some cooking in a hotel.
Look! This is a photo of ____ family.
I know he is a ____ boy.