If _____ carefully, the experiment will be successful.
In 1989, a(n) _______law was passed by the United Nations to stop people putting waste into sea.
Whenever a big company ______ a small one, the product almost always gets worse.
In the low latitude area, it is usually very _____ all the year around.
She ______ her trip to New York because she was ill.
I never expected you to turn ____ at the meeting. I thought you were abroad.