cording to the regulation, all _____should be examined before boarding a plane.

When you read the book, you’d better make a mark ____ you have any questions.

I failed my driving test again.— Don’t be discouraged. You’ll be successful ________.

The finance minister is not very ____ now since he has raised taxes to such a high level.

.. —All the building materials have been washed away.—So I have heard. But there was no sign ______ a heavy rain was on the way last night.