甲将自己的一台电脑借给乙使用，借期一年，期间乙又将电脑借给了丙。在即将到期的前一天，乙将此电脑卖给了丁，乙称自己有一台电脑在丙处，而且，丁曾经见过乙使用该电脑。乙、丁协议，乙将请求丙返还电脑的权利转让给定丁，丁同意。达成协议后，乙将此事通知丙。对此，下列说法错误的是：
请用其他单词或者短语替换下面括号中的内容，并且保持句意不变。
1.It is (OK) to be 15 to 30 minutes late in some areas.
2.In foreign countries, we need to respect local （traditions).
3.I entered a chess (contest) and finished third.
4.He brought his chicken to the (market).
5.I met a childhood friend at the (party).
6.Some often throw a big party to (observe) Christmas here.
7.Students are (required) to sit in the front of the conference hall.
8.John, a tough (man), cried like a baby when he got his lost son back.
9.Jack, the (owner of this house), introduced us to the other guests.
10.Although this idea is very good, not everyone (likes it very much).
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