单选题
The Prime Minister explained the new policy of his government
in great detail
so as to win the support of his people.
A、
at last
B、
at length
C、
at most
D、
at least
【正确答案】
B
【答案解析】
[解析] in great detail详细地，与at length同义。at last最后；at least至少；at most最多。故选B项。
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