It was unwise of him to ____ the unreliable data in hisspeech. [ ]

You will never succeed _________ you devote yourself to your work .

My English teacher’s humor was ______ make every student burst into laughter.

We will have two family parties this autumn. One is at Halloween and _________is at Thanksgiving.

Plastic parts can ______ metal ones in many machines.But they don’t last long.