Have all the students known that our class will visit the factory this afternoon?—-YesEvery student______about it

We often have a walk ______ the evening of Saturday.

下列各句中，加点的词语运用正确的一项是

What do you like _______ lunch —I like beef and vegetables.

In order not to __________ any important details for the presentation, he wrote an outline to refer to. [ ]