The next day, the group of villagers had not gone very far ____ they entered a very narrow passage between two mountains.

he computersystem suddenly,there will be too much trouble.

When I was in hospital, my mother promised me that she would take me to Qingdao ________ I was well enough to travels, which ________ my recovery. [ ]

Shall we go out for lunch– Don’t disturb me. I ______ the letters all morningand ______ six so far.

If a television or radio breaks the new rules, it is forbidden to screen advertisements and the officials ______ face serious punishment