himself to his lab research, thefamous scientist missed ________from the liver cancer

I’m going to act in Jack Chan’s new movie!—Congratulations! You’re really——.

The single invention of the computer _______many new professions.

The old farmer’s eyes still shone bright in the wrinkled brown face and his step as he came across the room was ________, though slow.

Though many extra trains and buses are used to carry passengers, traffic tools are still ________ needed during the Spring Festival