I find it a little strange. I'd vote for the progressive form too.
With a verb that suggests a continuous action, it might work:
1. I've already interrogated the suspect for an hour. There's no way she's going to talk. But if you want to try applying the excruciatingly badly written TEFL exercises, sure, be my guest...
<people's usage of English is changing very rapidly>
It can change even during the course of a thread.
MrP