单选题
The manager gave her his ______ that the complaint would be investigated.
A、
admission
B、
allowance
C、
assurance
D、
insurance
【正确答案】
C
【答案解析】
[解析] A项的admission意为“允许进入”；B项的allowance意为“允许”；C项的assurance表示“保证”；D项的insurance表示“保险”。
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