问题补充:
Was it his daughter with her work the man spent the whole evening at home?
A. to help, that
B. help, when
C. helping, that
D. helped, which
答案:
A. to help, that
B. help, when
(答案→)C. helping, that
D. helped, which
解析:考查强调句型。It is...that是强调句型,有一般疑问和特殊疑问句形式,可以强调除谓语外的任何成分。句意“正是帮助他的女儿做作业,那个人才在家了一晚上吗?”spend time doing sth.“花时间做某事”。故选C。