We had no one us, for we could deal with the case all by ourselves.
A. help
B. to help
C. helped
D. helps
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(答案→)A. help
B. to help
C. helped
D. helps
解析：选A 考查非谓语动词作宾语补足语。句意：我们没让别人帮助我们，因为我们能够独自处理这件事。首先排除D项，helps为谓语动词，不作宾语补足语；no one与help之间为逻辑上的主动关系，故排除C项；have在本句中意为“使，让”，后面需加不带不定式符号to的不定式作宾语补足语，故选A。