The exporter usually makes an offer by cable _______ he receives specific enquiry.
A、at once
B、the soonest
C、immediately
D、without delay
【正确答案】：C
【题目解析】：A： at once 立即，一般放在句尾。B： the soonest 最快的，C： immediately 立即D： without delay 句意：出口商通常在收到具体询盘后立即用电报报价。
