---Will you please stay here for the party?---Sorry, I _____. I have to go to visit my grandfather in hospital.
I ________ ride a bike to school. But this morning I took a taxi because I got up late.
The colours of his clothes are different from__________of yours.
The tourists are__________by the_________scenes of China.
This computer is old, but it is ______ to me because it was a present from my dearest grandpa.
Nobody ______ to go into the laboratory without permission (允许).