Is Jim playing computer games in his room—No, he _____. The computer has broken down.

ttle Anna’s parents walked slowly,one after________, through the shallow water of a stream to search for her lostbag.

In our university there are several big parks ____we students can go to enjoy the beautiful scenery．

Nearly all educators believe that a challengingsituation can often _______ the best qualities of a person.

He waited for __________ seemed like an hour before he finally got the ticket.