–What’s his phone number?- 257-6890.A. ItsB. That’sC. It’sD. His

问题补充：

–What’s his phone number?

- 257-6890.

A. Its

B. That’s

C. It’s

D. His

答案：

A. Its

B. That’s

(答案→)C. It’s

D. His

解析：根据问句可知，答语的意思应是“它是257-6890”，而AD是物主代词，不符合题意，代替phone number应用it。所以本题选C。