Is man’s ability to reason that sets him apart from other animals?A. oneB. thisC. itD

问题补充：

Is man’s ability to reason that sets him apart from other animals?

A. one

B. this

C. it

D/

答案：

(答案→)A. one

B. this

C. it

D. /

解析：A.本句是一个特殊疑问句，前面有do you think插入语，应该用陈述语序，因此排除BC，根据句意可知应该是“微软公司研制出一种新产品需要花费多长时间”，不是考查强调句型，因此应选A