–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：英语中一般用it指代上文提到过的单数事物,用that指代离自己较远的事物.根据上文,他的电话号码是什么?-可知选C,用it指代上文提到的电话号码.