问题补充:
At the news of the earthquake, the soldiers did what they could the victims.
A. help
B. to help
C. to helping
D. helping
答案:
A. help
(答案→)B. to help
C. to helping
D. helping
解析:本题考查非谓语动词。句中the soldiers did what they could后省略do,to help表示目的性,故选B。