On the bank of the river, we found him ________ on the beach, with his eyes _____ on a kite in the sky.
The teachers are doing what they _____ their stuaits.
They were _____ inventors than pure scientists.
Old as the car is, _____ it works quite well.
The stubborn boy didn't _____ so that he missed the chance.
You'd better make a mark _____ you have any questions.