It was MaYun’s persistence and innovation ______contributes to the success in his career.

You didn’t wait for Mr. Smith last night, did you? —- Yes, but we _______. He didn’t return home at all.

We are proud that some students of our school ______ the making of the amazing video.

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

What ways can you think of _________ out the physics problem