题目内容
hoped to become a good teacher. This year he left the college and began to work in a middle school. He likes
his students and is strict (严格的) with them. He does his best to make his classes lively and interesting.
One day he carefully explained a chemical reaction (反应) to the students of Grade 2 in the chemistry
lab.
"Be careful, everyone," he said loudly. "Before I make the experiment, there're twenty five atoms of
carbon (碳原子), but after I finish it, there're twenty four atoms of carbon left!" He stopped to watch the
classroom and hoped his students would go on explaining it. But the young men looked at each other and
nobody answered him. He had to ask, "What happens? What makes the atom lost?"
The classroom was very quiet and none of the students looked at their teacher. "Who can tell us where
it has gone?" Suddenly a soft voice came from the back row, "We did not see anybody leave the lab!"
B. he couldn't do anything except teaching
C. he hoped to become a good teacher
D. he did well in all his subjects
B. his students wouldn't be afraid of him
C. his students carefully watched him making the experiment
D. his students could do well in chemistry
B. his students could find the atom of carbon
C. his students could count (数) the atoms of carbon
D. his students could make the experiment
B. they didn't understand their teacher
C. the chemical reaction was too complicated
D. they all wanted to drop the subject
B. the student in the back row didn't watch her teacher carefully
C. the student in the back row hadn't learned chemistry before
D. Charlie failed in making the experiment
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