When he was alive, the old scientist used to say that knowledge ＿＿from practice and he gained his experience by doing a lot of practical work

I hope to cook a delicious ________ for my mother.

I happened to notice Bob’s father quarrelling with the teacher in defense of his son. — No wonder Bob always performs poorly in class. It’s really “_______”.[ ]

The car the truck so closely, otherwise the traffic accident could have been avoided.

I’mcalling to enquire about the position __________in yesterday’s China Daily.