The number of children who have lost parents to AIDS to rise to over 26 million in 2011.
A. are expected
B. is expecting
C. are expecting
D. is expected
网友回答
A. are expected
B. is expecting
C. are expecting
(答案→)D. is expected
解析：the number of sb作为主语时，相当于三单形式，从本句的内容可知本句为被动语态，故选答案为D。