John does important research _______ the best ways to help the old.
The______friends you have ,the happier you will be .
She said_____ she was mad at Mary .
I found _____important to study English well .
.— Have you found the poor dog yet?— Yes. But he was____ when we found him. The bad weather killed him.
We will have two family parties this autumn. One is at Halloween and _________is at Thanksgiving.