--I saw Betty go to Grandpa Li's home just now. --Yes. She’s often seen _________ the old man with the housework.. A: help B. to help C. helps D. helped
—Would you mind giving your advice on how to improve our business management?
—If you make _____ most of the equipment, there will be _____ rise in production.
--You will get into big trouble ____ you can’t prove that you didn’t cheat in the exam.
--I know. I will collect enough evidence to make them believe me.