—What do you think of teaching, Bob?—I find it fun and challenging. It is a job __________ you are doing something serious but interesting.
— What question did the teacher ask just now? — She asked how well this materialelectricity or heat.
Mid Autumn Day of this year falls onSaturday.
I really appreciate their ________ you ________ after me while I was ill.
—In my opinion, he is a hardworking man. —________. He is always the first to come and the last to leave.
Since a sharp fall of stockmarket (股市) many people have ________ making other investments (投资).