I can't advise you what to do. You must use your own _____.
--- What has happened here? --- There was ______ accident here about an hour ago. ______ car hit a tree and ______ driver was killed.
We can’t get the machine to run. There must be ______ with it.
Only ______according to the directions can the medicine be quite effective.
--- I promise her daughter ______ get a nice present on her birthday. ---Will it be a big surprise to her?
Before the final examination, many students have shown ______of tension. Some have trouble in sleeping while others have lost their appetite.