阅读下列各小题，根据汉语提示，完成句子。

小题1: __________ __________ his accent, he must be from Guangdong.

从他的口音来判断，他一定是来自广东的。

小题2: Many famous people were __________ __________ his party last night.

很多名人出席了他昨天晚上的宴会。

小题3: What I __________ __________ is whether he can build up his confidence with our help.

我所关心的是他能否通过我们的帮助树立自信心。

小题4: I’ll let you know if anything __________ __________. 如果发生什么事，我会通知你的。

小题5: Ten workers were __________ __________ the mine. 10个工人被困在了矿井里。