At that time I had no idea ________ Icould hand it to him without being seen

Hello, waiter. We didn’t ________ any noodles,but there is a bowl of noodles on the _______.—- Sorry, it is my error.

I’m sorry; I shouldn’t have been so rude to you.—You ______ something not very nice to me, but that’s OK.[ ]

They are teachers and don’t realize _______ to start and run a company.

This important lesson by Professor Wang teaches primary students how to ________ themselvesfrom danger.[ ]