单选题 Sophia: There'll be an issue next month introducing your newly published book and I'd like to have an interview with you, if possible.
Josh: An interview ? I'd like to, but I'm afraid my schedule is 'all full.
Sophia: It won't take you long, Mr. Josh. ______.

A、 One and a half hours will satisfy
B、 One and a half hours will do
C、 One and a half hours will go
D、 One and a half hours will help

【正确答案】 B

【答案解析】[注释] “一个半小时就行”的习惯表达用do，故选B。