The boy often gives a satisfactory answer to the teacher's question, ___ just a ..

The boy often gives a satisfactory answer to the teacher's question, ___ just a minute. So he's usually the teacher's pet.
a. having thought b. and to think
c. thought d. thinking
为什么选A？ 怎么解释，其他项错在哪？
So he's usually the teacher's pet. 是老师的宠物？？？能这样翻吗？

The boy often gives a satisfactory answer to the teacher's question, ___ just a .. The boy ... as is often the case? help the boy Is the boy ---------English? The boy chicken Teacher is often ___ the classroom. Lucy often practises ____ the violin He is often heard ----in the room. In fact,often means that the