They do not sound very natural. Her house has an anti-thieves system and a fingerprint lock >> An anti-theft device is normally attached to something that can be stolen. Houses are fitted with burglar alarms which sound an alarm on entry.
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khoffShe didn't say it was impossible, she said is didn't sound very natural.I see, thanks. Whenever someone corrects sentences out of context, I often assume there's a "mistake" that should be avoided. Questions and answers out of context are always a problem for me... but I guess that's a problem for everyone, both students and teachers.