Prepositions
Q1
I'm sorry, I can't talk to you right now because I'm ..... another line. I'll call you back as soon as possible.
(*) on
(*) in
(*) under
(*) out
I'm sorry, I can't talk to you right now because I'm ..... another line. I'll call you back as soon as possible.
(*) on
(*) in
(*) under
(*) out
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