Mary felt________from the outside world，since she lacked an Internet connection and couldn’t receive any e-mail

It was ________ he came back from Africa that year ________ he met the girl he would like to marry.[ ]

Most of the big hotels in Shanghai were full last week, but finally we _____ find a room in a small one. [ ]

.We must take some photographs ______the microcomputer

There are six floors ______our school building. Our class is ______ the third floor.