问题补充:
As a single mother of three children, she has very little time she can spare to develop her own interest.
A. when
B. that
C. which
D. what
答案:
A. when
(答案→)B. that
C. which
D. what
解析:B 考察定语从句。从句中spare缺少宾语,所以使用关系代词,先行词被little修饰,所以不使用which而选that。故B正确。