27．After the bell rings, which indicates the ending of the exam, you ______stay where you are until all your papers are collected.

An artist who was recently traveling on a ferry to the southern island discovered ________ a long lost antique Greek vase.

Look! I’ve got the smallest camera.——I’m afraid not. Peter bought _________ one yesterday.

My sister and I are going to Tibet this summer vacation. 一__________.

_______role she played in the movie! That’s why she has a lot of fans.