问题补充：
---- How long does she read English every day?
---- She half an hour English every day.
A. spend, read
B. spends, to read
C. spends, reading
D. spend, reading
答案：
A. spend, read
B. spends, to read
(答案→)C. spends, reading
D. spend, reading
解析： 句意: —她每天读英语多久？—她每天花半个小时读英语。spend…(in) doing sth。可知选C。
