名人教英文：你必须十分警觉

keep your wits about you
你必须十分警觉

masako: i'd like to visit the old merchants' quarter today over on the east side of town.
马萨科﹕我今天想去城东旧商贾区游览。

lena: why do you want to go there?
莉娜﹕为什么要去那里？

masako: well the guide book says that there are a lot of really interesting old houses there that you can visit. some of them are over 400 years old.
马萨科﹕嗯，导游书说那儿有很多引人入胜的古老房子，值得参观，其中一些已有超过四百年历史。

lena: well that's true, but it's a very popular tourist area so you'll need to keep your wits about you.
莉娜﹕不错，但那是个游客爱到的地方，你必须十分警觉。

masako: why, is it dangerous?
马萨科﹕为什么，那地方很危险吗？