–What do you think of teaching, Bob?–I find it fun and challenging. It is a job ___ you are doing something serious but interesting.
—Where are we going for the National Day,the mountains or the sea? —Either will be fine with me.
All the teachers and students _________ National Day with a party.
The stones each ________ as much as two tons.
________ to overcome the difficulty,he works day and night.
一Did he notice you enter the classroom? 一I don’t think so.He _______ to the radio with his eyes shut·