I just did a test (created by a non-native speaker) and there were these two questions in it:
1. The firemen were standing ________ in case there was an explosion.
2.The teacher told the kids to stand ________ so that they all could see the experiment.
I think that in both questions both choices are possible. The author of the test obviously didn't think so. What do you think?
I'm not a teacher, or a native English speaker. Feel free to edit my posts if you encounter any mistakes in them (be it grammatical or vocabular). It'll help me to improve my command of English.